How to Use processes.yml to trigger update on Relation Entity / Collection Field

Hi Team,

I use processes.yml to trigger some events like create,update which works fine for most of use cases.right now i have a use case where i have to perform set of actions where update on Roles field of User Entity occurs / Related Business Units changes for a user. i tried coding under triggers section of processes.yml for update action with field name as roles . it is not working. if i try with any other field like first_name or last_name field it works fine. i am not aware on how to handle processes when have to listen to Relation entities like (Roles) or anything like businessUnits field.one thing i observed is that roles field is available in AbstractUser class which is being implemented in User class.
I am bit stuck on how to solve this . Please need some guidance to resolve this issue.

Thanks & Regards,
Shreyas S

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