Datarefresh doesn't finish

Hello PBI Community,

we've got a very strange behavior of an existing PowerBI Report. The report contains several tables from a SAP HANA Database. Last week we migrated the HANA Database to a new Server and Version. We checked that every table has the right hostname in it's source properties.

The problem is that the "Refresh All" doesn't finish. When we start a refresh the typical window appears and for each table the rows which have been loaded are counted up properly. But after loading all rows from all tables PBI doesn't finish it... Interesting: When we refresh a single table (right click on the table -> refresh data) it loads all rows, finishes it and the data appears in my visuals. When i select two or more tables it remains in the loading window.

I've uploaded the report to PBI Service... same problem here. PBI Service tries to refresh the data by an on-prem gateway but doesn't finish. The symbol with thos spinning points is still active after hours.

Anyone had a similar issue? Thanks for your help in advance.

Manuel