I cannot break blocks. 

I logged into preview, spawned underwater, and I could consistently break blocks. 

I then messed around with bundles. 

I tried breaking a block with a bundle. 

And I can no longer break any blocks. 

I checked key binds, all my settings, but it wasn't that. I reloaded the world, restarted the game. Restarted my xbox, still could not break blocks. All my other worlds were just fine. 

I tried changing my gamemode, nope. 

Changing my keybinds, nope. 

TNT, working perfectly fine. 

And I could also not replicate it, to provide a better video.(sorry) 

I can still place blocks though.