According to development team, we didn't have this issue on 9.1 SR2 because of a defect that which was failing to run loopback timed action for a variable.
This issue was fixed in 9.1 SR3.
According to development, this issue is caused by the difference between database and Engine time.
I understand that our documentation is not clear enough on saying that clock should be in sync for all the servers along with all the servers should be in the same time zone.
So to fix the issue, I am sorry but you have to make sure that the clocks on all server are in sync. I am going to raise a documentation defect for this so that in next release our documentation is updated accordingly.