This bug (windows loading on wrong display) has resurfaced in the current build of Orion, on the current build of macOS Sequoia
Version 1.1.2 (151), WebKit 625.1.8
When macOS has multiple displays, with the display setting to a single space for all displays (so menubar is only on one display), Orion is failing to re-open browser windows (reliably) on non-menubar screens. Instead, all open Orion windows have their positions reset to the main (menubar) display.
To replicate: Set a multiple display system as described, place an Orion window on a non-menubar display, quit Orion, relaunch. Observed behaviour should be all windows spawn on the main screen.
The exact conditions of this bug seem variable; whether it's a result of how recently the window was placed on the alternate screen(s), or which window was interacted with last.
This is a regression from behaviour observed with earlier browser versions (on macOS Ventura), which was reliable in this regard.