I was wondering if I can suggest you change the config of "Lost On Death," by a percentage instead of a flat rate here is an example down below.

  Default Setting:
    S:"Lost On Death"=20.0  
Example: Difficulty was at 250. Once you die the difficulty goes down to 230 when you respawn.

 Suggested Setting:
   S:"Lost On Death"=25%
Example: Difficulty was at 250. Once you die the difficulty goes down to 188ish when you respawn.

This is a neat idea, actually. I wonder if that could be done for sleeping as well.

For feedback, this was added in 1.14, will leave this open, might be ported eventually (will be long though).

Will not be addressing 1.12 issues, sorry for any inconvenience, I hope you will continue playing on the 1.16.5 version which I will be maintaining.