Why are entities added by other mods replaced with radars?

All entities with internal type radar are replaced by default. I can add exceptions on a case-by-case basis. Please let me know which item from which mod should not be replaced, and I'll add it to the list. Mods listed as optional dependencies should already be compatible.

Can I remove this mod from a running game?

You can! If you use the command /resetradars, all upgraded radars will be replaced with vanilla radars. Then you can replace the mod without losing all of them.