TRM BRFblus : prefilling table forms in MCF

I’m facing a dead end whenever trying to pre-populate a Table Form on MCF using BRFplus. Even when using RuleID/Activity '21' for form Pre-Filling. No data passed at all from the BRF+ side to the MCF.

My requirement is to populate some Table Forms on the MCF, which are grouped with an ISR Form under the same Form Bundle Type.