This was in the first level, on the very first hole where it tells you to press W or Space to jump. I was able to recreate this on the Mac download version as well as in the browser (Chrome v137.0.7151.120 and Safari v20621.2.5.11.8), didn't get a chance yet to try on the Windows version.
When the game first loads, I can walk straight into the hole and recreate it pretty consistently. If I spam A and D on the way down, that seems to help and sometimes I'll get the expected level reset. When this happens, I'm not able to recreate the issue without closing the game and reopening it, so it seems to be something that is fixed when the level is reloaded. I recorded this video if it helps at all: https://drive.google.com/file/d/1wArkxpXfzZX3mtsKnbuToU1MlqEOvm7_/view?usp=drive...