I am unable to eat food.  Even by right clicking the food, my hunger bar and the food count don't change.  See the vimeo video:

https://vimeo.com/335597417 (26 mb > 10 mb)

This world was originally made on 1.12.2 I believe, but I have opened and upgraded it in each of the minecraft versions leading up to this one, and never faced this problem in 1.13.2 or any other version.

This has happened to me on multiple occasions on 1.14.  It happened to me twice after I tried to drink a potion that was made in 1.13, causing my world to lag out/crash, and I had to remake my world from backups.  This is the first time this issue has happened without me trying to drink an old potion.  I noticed that leading up to this, when I tried to eat there would be a ~1 second delay between me finishing eating and my hunger bar changing, but now I just cannot eat at all.

Things I did leading up to this that I normally don't do:

• Saved and exited, and reloaded the world multiple times.  This was in an effort to get more hostile mobs to spawn (https://bugs.mojang.com/browse/MC-147890) .  After coming back, there were a lot more hostile mobs, multiple wandering traders (which you can see in the video), a lot more lag than normal, and the 1 second delay between me finishing eating and my hunger bar changing occurred.
• Changed my video settings; max framerate from unlimited to 120 fps, clouds from fancy to fast; entity shadows to off; particles from all to decreased; smooth lighting from max to min 
• Gave above average priority to the javaw.exe process