I also have just noticed these stutters since new sim update. On the ground and I’m sure every 45-60 secs or so I will get a second or 2 stutter the smooth then it’s as smooth as anything. It’s infuriating I have removed items out of community folder no avail. Disconnected USB devices still nothing it’s like it’s trying to either load in something or something working in the background. Almost like a sim connect issue. Also when using an external device to change aircraft settings I’m getting a complete slow down and halt and then when I stop moving that button (a slider) in this case everything speeds back up. It’s like something is interfering with the sim but can’t find out what it is.