In case anybody else has that problem:
Make sure you have Generate Overlap Events enabled for the overlapping actor as well as the actors being overlapped. And that the overlapped actors are, in fact, set to Movable if you use OverlapAllDynamic.
In case anybody else has that problem:
Make sure you have Generate Overlap Events enabled for the overlapping actor as well as the actors being overlapped. And that the overlapped actors are, in fact, set to Movable if you use OverlapAllDynamic.