Mine's been having similar issues. I've got a 2018 Intel Mac mini along with an Apple Magic Trackpad and Magic Keyboard, and the Trackpad stutters along like crazy sometimes. I've tried a bunch of things, and even though I'm able to "fix" it, it starts happening again at some point.My bluetooth has gone very glitchy since updating. Logitech mouse was extremely laggy and constantly disconnecting - had to swap it to dongle and its fine with that. Not just 3rd party either - my apple wireless keyboard is also constantly disconnecting. Its a bit infuriating that updates break basic functionality like this.