Adding to the documentation of issues from the June update. I don't think this exact one has been posted yet.
I have two indicator set up to tally counts from selected areas. They randomly work and then randomly break and show the new red x, but no indication of what happened to break it. Compound this with the fact that the update broke the configuration, troubleshooting is extremely difficult.
working selection:
broken selection:
Configuration panel that appears to still be functioning correctly but broken display:
I'm experiencing a similar problem that may be related. I'm dealing with a details panel that seems to intermittently croak (at least in configuration mode... it seems to be working in the live version):
I thought maybe it was my data source for the details panel, which is an attribute expression aggregating data from a table content item created from an Excel sheet on One Drive, but now I'm wondering if it's actually the June 2026 update that is causing this behavior.
Thanks for bringing this to our attention @Neal_t_k - I strongly recommend that you contact Esri Technical Support and open a case.
You can do that through your My Esri or the Esri Support App