Also,
* Mainline kernels are not officially supported, they are only provided for testing.
* Ubuntu 21.04 is soon about to reach end-of-life (https://wiki.ubuntu.com/Releases).
So please try installing Ubuntu 21.10 instead (https://ubuntu.com/download/desktop) and don't change the kernel. Then tell us if the same bug still occurs.
Also,
* Mainline kernels are not officially supported, they are only provided for testing.
* Ubuntu 21.04 is soon about to reach end-of-life (https:/ /wiki.ubuntu. com/Releases).
So please try installing Ubuntu 21.10 instead (https:/ /ubuntu. com/download/ desktop) and don't change the kernel. Then tell us if the same bug still occurs.