I believe I have fixed the grove bug for the next update so hopefully it doesn't happen again.
As for save data you'll have to go into the folder where the game is downloaded and go into the www folder and in the save folder will be your previous saves. Copying that to another folder before updating and then placing it within the save folder will allow you to keep your old save. Though be aware that certain updates this will break the game as certain checks may not be triggered. As of now the next update should not have any important checks to miss.
The spark in the mens bathroom is a coming feature involving one of the potions, I think that you can actually enter if you have the potion active even if there are no scenes yet, it should also show you a spoiler for what the event might entail.
Thanks for the support and hope you enjoy the coming updates.