Steps to reproduce:
If Orion is kept open or minimised while the Mac goes to sleep for a long period of time, upon re-awakening it Orion will have a white vertical bar on the left hand side. The only fix is to close it completely and reopen it.
No vertical white bars.
Orion and macOS:
macOS Big Sur and Monterey, at least. This has been present for a long time but hasn't been fixed it.