Not sure if you guys met this problem, the drop-down list of default slicer in Power BI is empty when clicking it the first time, and it will work normally by clicking it again to close, again to open. So, it's like I have to click it three times to see the drop-down list value.
My teammate met the same problem before and no solution. I tested it on another computer, same issue. Published to Power BI service, same issue. I also googled a lot, no similar issue found.
I think that maybe the version of your power bi desktop is out-of-date? But in your scenario, your run into the same problem in power bi service, it may be too many rows in this column, you can try to use DISTICT() function and then create a slicer using the new table to test.
BTW, the drop down list works well in my Power BI Desktop, and in Power BI Service, it load about one second and show the result as also. My version of Power BI Desktop is 2.72.5556.701 (August 2019) run on Windows10. My version of Power BI Service is 13.0.10599.151 run on chrome.
If the issue still occur, kindly share your sample data to me if you don't have any Confidential Information. Please upload your files to One Drive and share the link here.
Community Support Team _ DongLi If this post helps, then please consider Accept it as the solution to help the other members find it more
Community Support Team _ Dong Li If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.