Describe the bug
A note first: I am a lawyer, not a programmer, so I relied on Claude (Anthropic's AI assistant) to help me troubleshoot this and to write this report. The facts are mine.
From time to time, my FileMaker Pro windows move by themselves from where I placed them to the left side of the screen. I am not dragging the window when it happens. It typically happens when I switch to another app and then back to FileMaker.
It first happened on October 16, 2026, a week after version 1.10.1 was released, and has recurred since, including on 1.10.2. I had used BetterSnapTool for a long time before that without this problem.
What I have ruled out:
- FileMaker scripts. I ran FileMaker's Script Debugger, which caught nothing, and I deleted every script that moves a window. The jumping continued.
- Stage Manager. It is off.
- macOS tiling. All the tiling switches in System Settings → Desktop & Dock → Windows are off.
- "Snap earlier to the left when Stage Manager is active." It is off.
- "Integrate with Native System Resizing." It is unchecked.
What points to BetterSnapTool:
- On October 20, I quit BetterSnapTool and the jumping stopped. I watched for about 35 minutes.
- On October 16, quitting BetterSnapTool did not stop it, but restarting the Mac did. That day I had briefly opened a second desktop (Space) and closed it again before the jumping started.
A second, smaller problem: next to "Integrate with Native System Resizing" there is a yellow caution triangle. Clicking it opens a window I cannot read. I use Dark Mode, and that appears to be the reason.
Affected input device: None in particular. The window moves without my dragging it.
Device information:
- Type of Mac: Mac Studio (M2 Max)
- macOS version: Tahoe 26.6.2
- BetterSnapTool version: 1.10.2 (Mac App Store)
- Affected app: FileMaker Pro 26.0.3.307 (08-27-2026)
- Displays: One
I would very much like to keep using BetterSnapTool with FileMaker. I am glad to run any test or send any log that would help.
Walter Moore