My question was closed as off-topic, and it was suggested that Board & Card Games would be a better location. Okay; that works just as well. So I went to flag to request migration.
I was on mobile, so I opened up Chrome, opened the question, and tried to flag it. Except...
This question has been put on-hold since you loaded the page - please refresh and try your action again.
I decided to hit the "request desktop site" button and try like that. But... no dice.
I had reloaded the page, several times - so this error isn't very accurate.
I can flag it from my laptop, though:
This would seem to be a bug.