Hi,
This might be related to: https://github.com/glfw/glfw/issues/1357
50% of the time, the glfw window stays blank on Mojave until it is moved for the first time (the window just stays white). I am not sure if that is helpful but I remember SDL2 initially had the same issue on Mojave but it's fixed in their master. It even happens with a bare bones glfw example that just clears the framebuffer to a certain color.
Best,
Moka
if helpful, the SDL2 issue:
https://bugzilla.libsdl.org/show_bug.cgi?id=4272
PR that addresses this
https://github.com/glfw/glfw/pull/1346
Thanks for the report. This is a duplicate of #1334.