TextMesh Pro I encountered a weird issue

Hi,
I'm developing a game for Android, my Unity version is 2020.3.29f.
I ran into an issue with Text Mesh Pro:

on the left: this is how the text on the buttons should appear
on the right: the text on the buttons seem "pixelated"

this is the settings I'm using:


This issue appear on my friend's device but does not appear on my device, we both use Android devices, I think his device is stronger than mine.
the screen above is the main menu, this issue does not appear right away after the game is loaded, only after my friend has played the game for a bit and go back to the main menu.

there is a video recording from my friend: https://drive.google.com/file/d/1Q9krguTSbNi0fbJPFchuEQ68NLkqNY6h/view?usp=sharing

Has anyone encountered this issue? how can I solve this?
If you need more informations, please tell me.

 

While I don't know a definite fix, maybe try
- using a static font with fallback
- using a different shader
- updating Unity?

 

I have seen this issue before but can't specifically recall the exact source and solution. See the following thread where a similar issue was reported. Unfortunately, the solution isn't in that thread but I do believe the issue was due to some other shader potentially affecting the text.

I'll keep looking for the previous thread referenced in that thread as it did contain the solution for this.

See this thread as well.