Decision gateway is highlighted in the picture. Flow waits anytime between 3 to 6 seconds or more after this particular decision gateway (highlighted in yellow) to go to next activity. Because of this, message receive task (circled in red) which should accept new incoming messages is not getting activated again to absorb new incoming messages to resume process flow on new messages and thus causing failures. We have seen same behavior on different environments for same decision gate.
Thanks for your help.