The fact SC:U needed a patch on day one is not a good sign... Especially given some have reported the game lagging or shutting down impromtly before it.
It's being developed with Godot, a free and open source engine, not with hedgehog engine.
Even the lead dev was really surprised since the engine was not meant for big companies to use unless it was modified a lot.
May be that's why.
The glitches mostly was found (famously by TWIP) on PS4 version, right?
Heard no issues on Switch version (that only run on 30 fps), the version that I would get because of its portability feature.
All reviews for Switch seem good and they never mention any bug.
Source :
https://trafsert.com/sega-is-developing-sonic-colors-ultimate-with-godot-a-free-and-open-source-engine/