App Designer runs when trying to edit.
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I have experienced this issue before, and fixed it by saving my work and/or restarting MATLAB, but now the problem is not going away even after restarting my computer and it is making MATLAB unusable. I'm using MATLAB R2019b in Windows 10.
Whenever the AppDesigner window is in focus, it spawns a new version of the app I am building. If I close the window, or refocus the AppDesigner in any way (clicking back, alt-tab, taskbar), it immediately spawns a new app window. I can't do any work at all when MATLAB does this.
What causes this behaviour and how can I I prevent/stop it?