REST API/RTC: Fix divergence when two offline users reconnect. #51872

Job	Run time
Check PHP compatibility / Run compatibility checks	24s
Slack Notifications / Prepare notifications	6s
Slack Notifications / Success notifications	4s
Slack Notifications / Failure notifications	0s
Slack Notifications / Cancelled notifications	0s
Slack Notifications / Fixed notifications	0s
Failed workflow tasks	-1s
	33s

Provide feedback