Anker liberty 4 active noise cancellation issue

Hey there,
i recently bought the Liberty 4 earbuds.
When i use the noise cancelling mode on hear id auto mode i am having really weird sounds like someone is knocking in my ears,
Now you may think im new to noise cancelling but i already owned the liberty air 2 pro for 2 years almost and this is a clear issue.
Im using firmware version 04.19
I hope you’ll release an update or find a solution.
Very appreciative your work guys!

yes every soundcore earbud i have ever owned has had this issue are you using third party EQ with the anc on ?? i get the same static sound soundcore’s EQ needs a total tune up as soon as i hit the anc everything falls apart