Tinderbox 11; Mac 15.6.1
In outline and map views, the moveable divider line between the outline/map and the “note pane” on the RHS, won’t “stay” where I put it.
I can make it work by quitting and reopening the app, but I didn’t have to do this previously.
For now, just close and reopen the document, should fix it
I have experienced this issue on occasion, too. But I can’t consistently reproduce it 
I believe it is tied to Tahoe, though it sporadically occurs in previous versions of macOS. It is likely tied to some unusual element (Filter?) in the current view. I’ve not been able to reproduce this.
TY. I’m running Sequoia 15.6.1
I also see this. I thought it was related to version 11. I have never seen it on version 10, but I have not used it in a while now. I use my laptop connected to an external monitor with the laptop screen closed but sometimes opened. I think I see this more often when opening Tinderbox and the window is “wrongly” positioned and sized because it was on the other screen last time.
I cannot reproduce this. I suspect it is tied to some less-used auxiliary bar in Tinderbox views, such as Filter or Find, or possibly to a specific view itself that isn’t Map, Outline, or Hyperbolic.
I started seeing it on moving from macOS 15.7.2 Sequoia to macOS 26.1 Tahoe.
I’m not surprised as macOS 26.1 seems very buggy and part-finished. It looks like Apple screwed up a lot of the behind the scenes permissions. For instance I no longer get any crash report logs, for any app. This appears to be a known problem.
Another since-Tahoe oddity is that clicking the badge-browser pop-over (in Outline or Map) only works about one in three times, else multiple clicks are needed to invoke the pop-over. I can’t reproduce it on demand (thus not previously reported) but the problem is consistent and regular. The OS pop-up for the filename in app windows is also really laggy in Tahoe, even on a fast/high-spec MBPro.
Perhaps I will put off updating to Tahoe.
I am also seeing this same behavior. TBX Version 11.0.1 (b737), MacOS 26.1 (25B78), Macbook Pro M1.
Goes away after closing and reopening the app. It’s not obvious how to reproduce it. When you click on the current tab there is a blue outline that flashes that is the correct size, but the divider isn’t lined up with it.
It is likely related to use of the top-of-pane control panels, either things like Find and Filter, or maybe views with top-of-panel panels like Parabolic and Attribute Browser.
OK will watch out for this and report.