I stupidly forgot about this issue then encountered it myself.
More thoughts in the thread below, such as it:
- only happening with custom fonts (not a copy of the system font)
- only at high frame rates (46 and higher)
- only happening on my game over screen and not in my main game state (which is busier so I guess GC is being triggered by other things)
https://devforum.play.date/t/memory-build-up-using-font-drawtextaligned-at-high-setrefreshrate/6700