Comment 598 for bug 1776563

I can confirm that downgrade to bios 1.13 definitively solves freezing problem (was drastic on 1.18) and also grub slowness. After revert to 1.13, everything is now super stable.

Firmware downgrade, though, is not straightforward, here is procedure

https://community.acer.com/en/discussion/599232/a315-41g-1-17-bios-bootloop/p2

Thank you @siyia, f**k you Acer.