Please restart game
~ first time I've seen this! Red alert bloom around edge of screen doesn't go away. Duplicants have stopped moving. Otto came to save Nisbet, but she now appears at the far bottom left of the map under magma. Duplicants do not respond to move-to command.
Their calorie count still decreases, liquid/gas models operating normally.
The game appears to have essentially crashed without actually crashing. Hopefully the save and/or logs provide some clarification.
A save at the crash is attached.
An auto save prior to the crash is also attached.
Try and save Nisbet from dying, turn on red alert, and watch the game self-destruct :P Maybe it had to do with a coincidence of Otto picking up Nisbet as she died? I do not know exactly how many seconds she had left, but I thought it was many (she's gone incapacitated several times before)