thanks for reporting, are you playing the web version or the downloaded version? Have you used the cheat menu when this happens?
The latest download version, yes to the cheat menu, mostly for adding extra energy during the day, but the soft lock never occurs while using the cheat menu. Also encountered a hard lock last night with the hydraulic part purchase. If I pay full price for the part it proceeds normally, but if I try to get the discount for the part, the game hard locks when the screen switches to start the activity/dialogue.