“Manual” means it doesn’t expire naturally, as you may have discovered, so you’ll likely need to add a second trigger to clear the status yourself… which I am surprised to see we don’t already have an event for. Just added it to my to-do list.
I’m also modifying the “until start of next turn” timing to work for Shutdown like it does Exiled (e.g. fold space), which shared the same problem.
I don’t see a good alternative solution until the next monthly update drops; thanks for your patience til then.