I, too, have been experiencing random freezes. On Version 0.99.113.2-beta (WebKit 613.1.12) and the previous version. (M1 MBP, macOS 12.2.1)
I can't say with any authority if there is a pattern to why it happens or when it happens, but along with the Apple mouse scrolling issue, together these issues are making the Orion experience too chaotic at the moment. Too nascent to use as a browser just yet.