UPDATE: Issue fixed with new json theme. However, mattlee there is a problem with the button fill. The fill doesn't actually fill the whole of the last button and is a visual glitch. See the screensh...
mattlee
Microsoft Employee
Microsoft EmployeeIs this still an issue for folks? Please confirm version of Desktop the format settings were created with.
We cannot repro - using new button slicer, we have tried conditional formatting font color for Callout Value (using a Rule), and have also set Selected font color for callout value and Selected background color for the Buttons. If this is still an issue, please specify Field Well setup and specific format options used.