Page Flow / App Connect / Framework7: Wappler frequently crashes in the flow editor

Quit simple: add a Page Flow (in a Framework7 project), open the flow editor and start editing, I added Framework7 Prompts or Alerts.

Took me five attempts to get this simple flow created, the latest crash was when I tried to change the prompt to age:

Wappler just crashes randomly without warning in the middle of the editing. Now 6 of 8 times.
Someties Wappler manages (hopefully) to send a error report.

EDIT: after the last crash, the change of the prompt was applied (change from prompt to age)

EDIT2: …but then crashed on save / closing the dialog …

Intel Mac Book Pro, Wappler 5.4.1, Mac OS latest…

(Can’t count how often I have seen this window in the past 8 weeks or so)