Version: 2.116.966.0 64-bit (April 2023) When setting the Tab order on the Selection pane any changes to groups do not stick when navigating away from the tab order pane. To recreate: Chang...
I am also experiencing this issue. Power BI version: 2.118.1063.0 64-bit (June 2023)
The issue is that after setting the tab order, if you navigate to the 'Layer order' tab and then back to the 'Tab order', the tab order of any groups is changed to something else (this new order tends to be consistent and I suspect is related to the position on the page).
Given how important tab order is for accessibility, I would expect this issue to be prioritised.