A powered sticky piston or piston with a slime block or honey block can cause a player suffocation.

I was making some Redstone contraption when I saw something weird about my bar, I don't know if this is a bug or something that needs to be fixed. The bubbles should only appear when you are underwater but when you get suffocated under a redstone contraption the bubbles showed up on my bar, it makes sense though. Please fix this issue and thank you in advanced.