Textmesh Pro Fallback Font occasionally does not render

I have a project that uses a fallback font for certain icons that I interleave with text.

The fallback consists of 16 unicode characters uE000 through uE015

I am having an extremely weird problem where sometimes the fallback characters do not render. Some will render and then others suddenly will not. If i go into the textbox in the editor and do anything that would trigger a change (add a space, etc) suddenly the characters render.

I have also tried using to specifically ask for the fallback font, that doesn’t seem to work any better.

For the life of me I can’t figure out what could be going on here.
Any help would be incredibly appreciated. Thanks!

in case anyone has this issue i rebuilt the textmesh pro component and that fixed it