Sprite atlas distorted

My sprite atlas are distorted like these. original textures are fine but when creating sprite atlas it will be distorting.
In unity editor standalone platform it shows fine.

What may be the possible reason behind this?

Using unity2021.1.2f1 android platform.

ss

I am also encountering this issue. Dont know why its hapenning.

We found that the problem is used compression Astc6x6 in our case. Then we found these two issues.

fixed the issue after upgrading to unity2021.3.5 LTS