Had an issue on the Chemical Plant Zone part 2 boss (Switch/handheld). After I defeated the boss, I couldn't go anywhere. I jumped to the part where you had to jump to to be sent to the upper part of the level, but nothing happened. After trying different things and some button mashing, none of the buttons did anything anymore (felt like the game locked on me, but the music was still playing), so I put the Switch in sleepmode (which took like 3 presses on the power button), after which I looked up what I had to do next to finish the stage. Turns out I was standing in the right spot and the level had to shoot me upwards, which it didn't do. So I turned on the Switch again and I only saw a screen full of tiles from the level. The music still played though. This time even the menu button didn't do anything. I wanted to record it with my phone, but just when I booted up the camera on my phone, Sonic shot through the whole level, to the correct spot where I could finish the stage.
I have no idea what happened here. I managed to shoot a very small clip of me shooting through the stage.
Click! (Spoiler-free). You can see in the first second of the video that I fell through the level, next to the tube that's supposed to bring me to the exit, and the game moved me a couple frames to the right to push me into the tube.