Lookup View on Subgrid doesn't reflect defined view

Hi all

I have an issue with the lookup-view on a subgrid:

Eventhough I defined the view "B2C Segmente" as default view (on the subgrid) - it seems, that the default view did not change in the subgrid (default: Segment Suchansicht [Segment Searchview]). 

We published the solution multiple times, as well cleared the cache - but this did not seem to help. We're using Dynamics 365 Online.

Any help very much appreciated :)

Greets, Andrin