it returned
however I went to the lake and there is no monster there.
in an older save it says
and there is a monster in BOTH the clinic AND the center, but not in the lake
in another older save it says
in which case there is a monster ONLY in the center. there is no monster in either clinic or lake.
so to sum it up. there are 3 spawn codes. 2 of which are bugged.
Center = spawn monster in center. correctly.
Clinic = bugged. spawn monster in center AND clinic
Lake = bugged. do not spawn any monsters.
since there is no lake monster, once the lake option is rolled you get stuck unable to spawn any more monsters.