Hi, @mattb… I just did a quick test, and I didn’t have a problem filtering a repeating group using a multi-select dropdown. Is this the general idea…
… and if you remove one of the options in the multi-select, the associated records are no longer visible?
If so, here is the constraint I used for the repeating group’s search…
Sorry if that isn’t what you are going for… definitely don’t like to waste people’s time. Hopefully it helps, though.
Best…
Mike