dreadful dirt doesn't work without players nearby

[jlp1528]

Modpack

FTB Presents Direwolf20 1.21

Modpack version

1.8.0

Launcher

FTB App

Has the pack been modified

No

Log Files

No response

Describe the bug

see title, also see #6416

Steps to reproduce

1. Use a rotton egg on some dirt to get a 5x5 area of dreadful dirt.
2. Dirt spawns necromancers and only necromancers while player is nearby and area is dark.
3. Chunk load area.
4. Use something to collect XP like a JDT experience holder.
5. Observe no rise in XP upon returning to the area.

Expected behaviour

dreadful dirt should spawn all mobs regardless of whether a player is nearby

Screenshots

No response

Additional information

No response

[Nexadon]

Dreadful dirt has stopped working at all in Evolution