The Mac screensaver ecosystem's going through some interesting shifts in recent years. The permissions and stated capabilities of 3rd party software are much more delineated now, but screensaver modules are architected in an old NeXTSTEP kind of way, where software you trust loads and runs software you don't.
It's not visible to end users, but nowadays, Apple-authored screensavers use a private framework, and 3rd party screensavers use the traditional framework. Sometimes the traditional framework hiccups. Because these aren't essential programs, presumably they are lower priority, so it may be a while before things settle:
https://github.com/AerialScreensaver/ScreenSaverMinimal?tab=...
https://github.com/AerialScreensaver/ScreenSaverMinimal/wiki...
Nevertheless, here are a few more contemporary offerings:
https://github.com/agarrharr/awesome-macos-screensavers
And here's mine from last year! Got another one in the works.