I have the same issue. Replaced the batter but still there is a freezing effect. I feel its the communication back the receiver. The distance does matter and maybe interference from other sources. Mine is about two years old and recently I have seen a lot of freezing. Time to buy another one. Maybe with a cord.
Wireless Vertical Mouse - Freezing
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I have the same problem with one of my anker mouse/mice. I have 2. One is working correctly and the other is working intermittently as described above. If I move the bad mouse within about 12 inches of the usb dongle, it works. Normal position is about 24 inches and the other mouse works perfectly from this position. Also, as above, if I change the batteries on the bad one, it works for 5 minutes or so. I am curious to know if the issue is with the mouse or the dongle. BTW, I love this mouse. I have ergo issues and cannot use any other type of mouse. I purchased my first one in 2015 and have purchased 4 over the years (lost one and gave one to the kids). I have used their keyboards too, loved them.
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Hi,
I have the same problem with my Anker 98ANWVM-UBA. I’ve had this nouse for one year. It’s been working great, and suddenly one day it started to lag dramatically in windows 10. At first I thought it was the batteries. So I replaced the battery. But it was still lagging. So I changed the batteries again. Same thing. The mouse simply freezes and jn freezes during movement. The USB dongle is only 30 cm away from the mouse.
I have another vertical mouse similar to the Anker, so I decided to test it to see if the problem was with my windows installation. The other mouse works fine, no lag at all.
So I’m really wondering what is happening with my Anker mouse and why all of a sudden it stopped working correctly.
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I have the same problem with my Anker 98ANWVM-UBA. The mouse staggers from time to time. No rhyme or reason.
I got it in November 2018 and had no issues for approx 1 year. Then it started flaking out.
I had it pluged into a KVM switch so I can change between my personal PC and my work laptop. I moved the switch (with the dongle plugged into it) to within six inches of the mouse and it still staggered. I tried plugging the USB dongle directly into the laptop - same thing. Plugged it directly into my desktop. Same thing. Changing the dpi setting has no impact on the stagger. It staggers for approx 3 seconds about 4-5 times per minute. I have replaced the batteries with brand new Duracells right out of the box. I have tried turning the mouse off and on again. Nothing I do prevents staggering.
It’s a shame because while it worked, this mouse was FAR superior than the prior vertical ergonomic mouse I had. I just can’t tolerate the staggering anymore. It has a significant impact on my productivity.
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My anker mouse started acting like a jerk, meaning it had a jerky movement that drove me crazy. I found out it doesn’t like to share the multi-port adapter with other USB devices on my MacBook. When alone on the USB port mouse is happy: what a jerk!
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My brand new mouse was also freezing on my MAC. Thanks to this forum I moved away from sharing the keyboard and mouse on a multi-port adapter and gave it now a single dedicated USB port while my keyboard is on another one. Everything works smooth now 
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Hi, I had exactly these freezing problems and I ended up moving the USB micro adaptor from the rear of the PC to a single port on the front of the PC. Much closer to the mouse and away from the noise of the rear of my PC. Now works glitch free even with nearly flat batteries.
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I also had what I call the mouse stuttering issue on my Windows 10 system. I also ended up moving the USB micro adapter from a group USB hub in the back to the front top of my computer into an individual USB outlet. The mouse now works perfectly. I have a second Anker mouse like this one on my ASUS Chromebook. I have never had an issue because I only have two USB C outlets on the laptop. One is used only for power, the other, my Anker mouse.
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I have a little fan that keeps an ultra fast mini hard drive cool. I had it too close to the receiver. My tip would be move the receiver to another location…in my case I used a hub.
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Great suggestion
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Hi to all
I have the both mouses (wireless vertical and normal USB vertical) and I can say I had the same problem on both but also only after a period of time maybe a year like most are saying, I mostly only have the issue when the CPU goes more than 60% of usage while opening a simple app like spotify or even Outlook (I have an intel i3 8100 on a desktop).
I have indeed the mouse receiver and USB cable on dedicated USB ports (tried both 2.0 and 3.0 already) and the issue remains, could be a hardware issue indeed or a faulty firmware.
Cheers to all!
PS:
I still keep using them tough cause I cant afford right now the other vertical logitech ones XD
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I am/was having this problem, it really plagued my productivity and was source of many frustrations. The receiver was connected to a hub on a 2019 MacBook Pro. Replacing the batteries helped but for a very limited time.
The solution I found was to have a Usb extension and connect the receiver closer to my mouse. It is working fine now. I try to keep the mouse within a feet and a half from the receiver.
True, the more transmitting items (bt, WIFI) the more interference,
Claro, the closer the transmitter is to the receiver the better
Usually yes but it can also be because the Lower part of laptop is metal and absorbs the radio signals from USB transmitter. It’s worse with rigid metal case laptops.
I fixed this issue by buying a different brand wireless vertical mouse. Connected the new one exactly the same way as the Anker wireless vertical mouse and it doesn’t have any lags. So the issue is with the Anker wireless vertical mouse, not where and how you stick the dongle.
Different type of bt (mouse)?
Not easy to do a diagnosis from far away. 
You should try the mice with different laptops.
I have the answer!
Had the problem of jerking and stuttering mouse pointer. Had to keep on picking up the mouse and then put it down to move the cursor.
I tried: new mouse mat, new batteries, cleaning the optical window and nothing worked.
SOLUTION
The problem is all about RF interference. The signal is very weak from the mouse (which is fine as it doesn’t need a powerful RF signal). My Anker USB receiver dongle was 10mm next to a Bluetooth USB dongle. Big problem as Bluetooth is more powerful and interrupts the weaker Anker 2.4Ghz signal.
I moved the Anker USB receiver dongle to a different USB port only 80mm away from the Bluetooth dongle USB port and the mouse works 100% perfectly. Totally smooth, no stuttering, no jerky mouse cursor.
Please use a USB port which is directly in front of the mouse. Not at the back of a desktop PC. Imagine this: can the mouse see the USB dongle if it had eyes? Then make sure you have some distance with another USB transmitter/receiver dongle. Buy a small USB extension extension lead if you don’t have USB ports on the front of your computer. So you can bring the Anker USB receiver to the front of your PC.
Just simply moving to a new USB port solved the problem and now it works amazing.
This is the reason I use cabled mice only.
Too many bt items around!
Hi,
I also started having this problem about a year after using this mouse. There seems to be a blind spot either in the dongle or the mouse as there is a few spots on my desk where it sticks and none of the functions work. using a different port or extender doesnt work. By looks of this forum ALOT of people seem to be having this problem so @AnkerSupport should really issue a recall or some new transmitters!
Have you tried contacting them?