If you don't know, sprinting and jumping in a 2x1 tunnel, makes you go super fast. However, when I do this I get stuck on the roof of the tunnel and suffocate to death unless I press the W and spacebar keys. This makes it annoying since I suddenly phase through the top block whilst running in caves and die with all my ores and experience.. 

This issue also persists on realms and worlds..

Version 1.17