GBS Developer Mode not showing actions of GUI properly

[UnknownMartin]

Decided to reflash my GBS Control to the latest firmware (haven't since around 2022) and while the GBS itself works (changing resolutions, adjusting brightness, all the jazz), the text in the Developer Mode is showing odd messages:

Most of the GUI buttons shows this "serial command _" instead of "Brightness+" for example.

Unsure why this is happening. With the older version of GBS-Control-Master, it did not have this issue. Reflashing to the current one kind of caused it unfortunately. Did I mess up the Arduino install? Is it the board itself failing?

(Also felt like adding this in...)
When using my PS2, pressing the Oversampling button (I want to change from x4 to x1 or x2 to remove the green hue) has my GBS Control lose connection to my PC. When using my Gamecube which is already outputting 480p, I can switch from x1 to x2 just fine. But using my PS2, the GBS just decided to stop. It still gives a picture, but I can't adjust any settings without needing to remove the power and then replugging it back in.
Sorry for adding another issue, but this was what sort of caused this entire ordeal in reflashing the ESP to the more recent version