Me being a January 2023 applicant, mine also changed my Background to In progress on April 19th. I think your hypothesis is valid to try to minimize delays.Very strange indeed. Either they fixed synchronization issue so for many people the status changed to a real one; or they broke something and it’s just a glitch; or they just dumped everyone to CSIS before the strike in the effort to minimize their backlog when they come back… But it all just speculation of course.