Steps to Reproduce:
- Open a new window, using the menu or cmd-N (or quit and re-launch Orion)
- Grab one of the sides or corners and resize the window (larger or smaller - same outcome)
Observed
The window spits, with a sidebar appearing on the right side. The sidebar has the title "Label":

Note that this happens irrespective of which website is being displayed (and also happens with a new, empty window, without a site loaded)
Additional info
If the sidebar is closed after its initial appearance, and the window is re-sized larger and smaller, the sidebar does not appear again; it only happens for new windows.
Version 0.99.137-beta (WebKit 623.1.8.0.0)
Build date October 24, 2025
M1 MacBook Pro (macOS Tahoe 26.1 build 25B78)
All extensions disabled
Does not happen with Safari
Expected
Window should simply resize, and not show the sidebar

Version 0.99.137-beta (WebKit 623.1.8.0.0)
Tahoe (26)