I use Manjaro, but I run it like vanilla Arch (for example pacman/yay and not pamac). I find this to be a sweet spot for me - rolling releases are so incredibly nice, and Manjaro being slightly slower than Arch is good from a stability standpoint in my experience.
I use ZFS all over the place, including the root storage pool on my home server, which has overall been a great experience with systemd-boot.
This has been a long standing issue, not just in the last update. Force stop then clear cache and it'll be better... For a while...