Hi Swati,
did you find any solutions?
We find a similar issue on BPC 10.1 SP 18-2, on Excel 2010.
When we open a workbook, after automatic refresh, the elements within EPM member selector are unusable: it's impossible to select one member even though the EPM member selector menu works.
If I try to stop the automatic refresh, I can select some members on EPM Member Selector
Thanks
Valeria