Dunno if it's a bug that has been found before, but on a minmax NTR route I've been doing (trying to get all the events I can ONCE before cycling to get lewdness), after doing the second town until the end of the goblin mines quest (entered town -> returned shovel -> drunk event -> trainer event -> didn't pay up -> raped by the shroom -> raped by the goblin -> didn't save her -> tree -> immediately back to the mine -> got the boss scene -> defeated it and came back to town still poisoned), when I try to farm Groping to more than 9 with the trees event, it doesn't work.
It's not gamebreaking, since i can just go to the starter town and farm Groping (until Lewd 3, which is when the weird bug gets fixed), and it's REALLY specific, so I could see how it may have gone unnoticed, but has anyone else gotten this bug? Just noticed because I only recently started this game and was on a true pure route before.
EDIT: Did some more testing, it wasn't just about getting Groping to 10, it was until I got Lewd to 3-