UWL substitution vs. RMPS_SET_SUBSTITUTE

[Shai Eyal]

Hello all,
I've noticed some strange behaviour with UWL substitution and I wander if someone came across as well.
If I define substitution via UWL it works well. However if I define the substitution via RMPS_SET_SUBSTITUTE on back-end, it does not affect UWL. It only affect SAP Inbox. The strange thing is I know it suppose to work. In addition, UWL substitution management screen lower part shows the definition set in RMPS_SET_SUBSTITUTE. 
 
Has anyone experienced such behaviour? any recommendations\suggestions? 
 
Thanks in advance,

Regards,
Shai Eyal
SAP Workflow & BPM specialist
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