Anker Soundbuds Slim+ Video delay issue

I got my Anker Slim + yesterday with 18 months warranty from Aliexpress and have found the problem that video lags behind the audio by a few seconds. I am very certain about the problem that Video lags behind the audio. The lag happens when I use buds on Online Videos such on Youtube,Netflix and Facebook several times. I have tried deleting the bluetooth profile from my phone, check on multiple phones and my laptop as well some of you suggested but it did not fix the problem.
Kindly Solve this issue

That’s really strange honestly, since websites like YouTube actually compensate for delays…

Contact support at service@soundcore.com

Have you tried a reset on the buds themselves by pressing the volume + / - for 5-10 seconds to hard reset?

Yes i have tried that. But nothing happens

Ok i will. But what will they do ?

They might have a fix for it. Or if it’s a possible defect (messed up antenna or something) they might replace them.

Ok. Thank you i will try