I built cubfan's bubble based guardian farm on my hardcore server. But it's much more ineffective in this snapshot. I remember building it on my last server which was 1.15.2 and it worked perfectly. Now, for some reason, 1 of 10 guardians gets to live and the others die in the lava.
https://www.youtube.com/watch?v=Q1U5FWYBr80
Linked issues
duplicates 1
Comments 4
Guardians swimming on lava has been happening for a few versions now.
Edit: This is the bug report; MC-151929
Duplicate of MC-151929
I should also say that I loaded his downloadable world and it had the same issue on there aswell.