Last player on my server left the game normally, server was working fine while he was connected. After that, the server abnormally crashed.

Used datapacks utilise minecraft:tick. They are from vanillatweaks, downloaded for version 1.14.4. Haven't had any problems with them, in 1.14.4 nor 1.15.

I've replaced all instances of the same player name with *Player* for anonymity in the server log and crash report.

What I expected to happen was...:
After the last player leaving, server normally idles.

What actually happened was...:
Server crashed because a single server tick took 60 seconds. The times in the log file are all mixed up.

Steps to Reproduce:
I've been unable to reproduce this bug.