I assume it has something to do with consecration and Tinker Construct because both are on the log. But the affected entity is a creeper and consecration doesn't touch them....
I'm reporting this to both

consecration-forge-1.16.5-4.0.0.5.jar
TConstruct-1.16.5-3.1.0.231.jar
Mantle-1.16.5-1.6.115.jar
forge 36.1.62

Crash report
https://hastebin.com/efuwajexah.rb