Couldn’t figure out how to edit my previous post thus the second.
Switching to the H9000 as Master has reduced the number of clicks but not gotten rid of them. Oddly, it doesn’t click across all the AES outputs at the same time, it’ll be on one side of one pair and it seems to cycle through them. This is in PT Ultimate 2019.12 on a mac by the way. All Avid & Digidesign interfaces connected with Loop Sync and the Master clock set to AES in from the H9000 currently.