As the title says, I need to re-apply the custom font everytime I login or reload my UI. I do have an addon changing Blizzard master fonts, however, not sure if that might interfere? But I did check without that addon, and the problem persisted.

Anyway, thank you for your work, this addon is amazing.

Yeah, heard this report earlier as well, it happens when you use custom fonts from an addon that loads later. 369fa14 fixes that.