I opened a topic on Saturday with the same issued (after many hours trying to resolve) it appears that my Roon Core on iMac streaming to my Roon Remote on iPhone or iPad is spiking memory but not actually swapping memory to SSD but the Roon Remotes become unusable.
When close the Roon Core window and wait 60 seconds and then reopen = all remotes function for around 15 minutes then they get sluggish and I need to restart Roon Core again by closing and starting the Roon app again. I would love to know how to solve this problem.