BO4 - Adding Unlinked dimension to block when multiple data providers in report

Hi,

We have a report 3 queries, 2 from 1  universe, 1 from another.

Can select unlinked dimensions and include in report - merged dimensions fine

e.g linked on customer no, product no  one data provider has cus address when try include says cannot drop here - object is incompatible.

Even same message if create this dimension as a detail object.

Interestingly if build report and select all at once can include the unlinked dimensions just get this behaviour when try add dimension at later stage.

Anyone know best way to avoid this - old XIR2 would behave O.K when used this as unlinked dimension.

Thanks