webGL artifacts on Firefox on Mac

[ideathingdev]

Specifically I have my textmeshpro text flickering and with some weird artifacts. They appear when I call StartAR.
At the same moment I get the warning:

WebGL warning: drawArraysInstanced: Tex image TEXTURE_2D level 0 is incurring lazy initialization.

WebGL warning: drawArraysInstanced: Drawing without vertex attrib 0 array enabled forces the browser to do expensive emulation work when running on desktop OpenGL platforms, for example on Mac. It is preferable to always draw with vertex attrib 0 array enabled, by using bindAttribLocation to bind some always-used attribute to location 0. 

You can see these even in the live demos.
Any insight please?

[ideathingdev]

It's very strange but moving the text elements in the z axis is a good workaround. The glitch is gone, and I'm not sure it's related to the warning I shared