[Error] Couldn't load the data for this visual in DirectQuery mode

[tiffany1234]

Hello, we are currently encountering an issue regarding data in the "Direct Query" mode: 
Within the Slicer:
If it's single selection, the visualization chart encounters the following error: [OLE DB or ODBC error: [Expression.Error] Unable to fold the expression to the data source, please try a simpler expression] (as shown in picture below).
If it's multi-selection, the visualization chart displays correctly.
May I ask what could be the cause of this issue?

[lbendlin]

Look at the network trace .  Most likely it is messing up the IN version with a single list item.