Attempting to connect to my server locally or remotely results in timing out. Timing out keeps the player in the list of players, and doesn't result in an error on the server or the client. The server is showing MSPTs in the range of 2000 when players are connecting. The server is showing MSPT in the range of 180 when one player is connected.

I can connect about 1% of the time, and even then only if I have set my player's NBT data to be far away from my base. If I get timed out, I then have to reset the server before I can join again.

Profiling suggests that entities are the issue, but its not clear which. "Unspecified" is accounting for 41% of total tick time.

[04] |   |   |   |   entities(180/1) - 76.46%/69.60%
[05] |   |   |   |   |   unspecified(180/1) - 60.02%/41.78%
[05] |   |   |   |   |   tick(22376175/124312) - 23.85%/16.60%

One of my guesses is that this is related to my decision to make my floor out of Seared Stone, assuming that it would be alright because its marked as "safe for decoration". I'm in the process of manually removing the seared stone blocks by editing the world NBT data, because I cant get close enough ingame without getting timed out. Alternatively there could be entities in my (quite small) pretty pipes network?

I've attached my latest.log and my profiling results.
profile-results-2022-03-25_16.45.42.txt
latest.log