Wait step stops during PI BPM workflow

Hello Guys,

I'm testing the one BPM scenario in my test system, during runtime the workflow stops before wait step (only 1 min) but after 1 min the message not process and it is stucked in 'in process' state.

Earlier the scenario works good with wait step, but now it's not working in Dev & test systems but only working in Production system,

Note: Recently we migrated from Service pack upgraded from PI 7.31 SP06 to SP11 in all three systems.

Do you have any idea on this error? could you please suggest me

Thank you.
Sateesh