Hello.
I noticed some time ago that when I use pc’s intended font workflow, colors except black will flicker in strange way, but only on mobile device. Better seen on bigger font sizes.
Here’s recording from my samsung a90:
Screen_Recording_20201107-234753
it’s a demo project that just uses text element.
https://playcanvas.com/project/735241/overview/flickering-font
I did managed to fix the issue using Canvas Font.