So I recently upgraded to a MOTU 8pre and shortly after I started having this problem.
What's happening is that playback in Logic randomly stops and restarts, usually a few milliseconds back but not consistently to the same spot, and sometimes back to the start.
The effect being a constant stuttering, stopping mess.
I've checked that there isn't a loop on (and as I've said it's not jumping back to a consistent point)
I've checked the CPU load and that's fine. I've tried unplugging the interface and the problem persists with the built-in audio.
I've tried changing the sample rate, which seemed to help once but only for an hour or so, and has since had no effect.
Usually the problem will get worse the longer the program is open. I'm sometimes able to use it for a few minutes, even record some audio, before it starts jumping around and becomes unusable.
The problem seems to be exacerbated by monitoring audio over playback. Like it might be playing back fine, but as soon as I attempt to play anything overtop it starts wigging out. Or if the problem is only happening a little, playing overtop makes it way worse.
Here's a link to a crude cellphone video of this idiocy in action: https://youtu.be/W6ZAGv90N6I (Please note the CPU load meter)
Please help! I've gone through so many forums and tried the workarounds for any problem that even seems remotely similar to mine with no luck.
Nothing I've read seems to be the exact same problem I'm having.