May I suggest popping up a warning about this when the session starts, and maybe another when it’s about to run out? I understand the issue with server load, but this was an unpleasant surprise.
Also, can you save in the ADRIFT webrunner, and will that preserve your game across sessions? You can’t save in Quest, so finishing the game in one sitting is really the only option (especially because I think offline play is Windows-only).