Error while setting dynamic timer (expression) in user task

[jai_iyer_tirumph]

Hi Expert,

I am trying to set a boundary timer for a user task as follows

Based On: Duration

Duration Based on: Expression

Duration: P0Y0M8DT0H0M

This works fine but, if I am trying to bind Duration with a context property like ${context.xyz.Duration} with same value (set like "Duration" : "P0Y0M8DT0H0M"), I am getting following error

An unspecified error occurred. Contact support citing logId 6dd72815-efa5-43ae-8ae5-570752deb067 and provide steps to reproduce.

Please help.

[jai_iyer_tirumph]

Extension to the question:

Also tried P6D, again works if statically provided but gives error when binded to context