As in the title, edit widgets in our EB app have stopped working correctly after ArcGIS Online June 2024 update.
On first use, the edit widgets (some of which are configured to edit related tables) display numbers instead of the correct strings.

After selecting one of the numbers and then going back, (some of) the strings are displayed correctly.

No changes have been recently made to the app or the widgets, therefore the behaviour looks like a bug introduced with the latest update.
Any assistance would be greatly appreciated.