Data in charts are missing after scheduled refresh from dataset

Hi community,

I've created a file in PowerBi Desktop (latest version) and published to PowerBi online.

Latest Gateway is configured and connection is working well.

Data is pointing to ODATA Feeds and sharepoint.

After daily scheduled refresh and clicking refresh button in report the data is lost in charts.(highlighted in images red)

Sharepoint data is populating after refresh and is working (marked black in image).

Uploaded pbix file , refreshed it  and published via PowerBI Desktop the charts shows data again. But after scheduled refresh data is missing again.

Hope you can help me to find a solution.

Image Data Available

Scheduled refresh

Mssing Data