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10:11 AM
So to add one more test.
The other room was frozen:
I will now try to move this message in here:
in Test, Jun 2 at 10:26, by Martin Sleziak
This is a test message - after this room is frozen (or deleted) I will try whether it is possible to move this message into another room.
1 message moved from Test
Now the message is displayed in this room's transcript: chat.stackexchange.com/transcript/94744/2019/6/2
So we can see that: 1. It is possible to move into some room messages which are older than the room. 2. It is possible to move messages from frozen rooms.
 

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