Hi Alexander,
Now this does not happen on all forms but on one of my forms I get this when opening in Display Mode (screenshot attached)
(The New form and the Edit form are OK)
FYI The form has Three vLookups on it but I have deleted those and it still does not open in Display mode
When that message is shown the “OK” button does not work on the dialog (I need to refresh the browser to continue)
Best regards
/Marcus