I’m experiencing occasional frame drops while watching 4K Remuxes with Dolby Vision on my Apple TV 4K (2017).
I moved your post to it’s own thread to get better visibility.
What tvOS and Infuse Version number?
Are the frame drops at the same point in the video each time?
Is this on all files?
If you can check, does the same video play normally on another device using Infuse?
tvOS version: 18.3 [22K557]
Infuse version 8.1
The frame drops appears to be random, and they don’t happen in the same spot. Maybe 10 times during a movie.
At one point it seemed to be pretty bad (1 frame drop every ~20 seconds) so I rebooted the AppleTV wich seemed to stop the frame drops for some time. 
It happened in 3 different movies this weekend.
Can you provide a screen cap of the speed test in Infuse for one of the videos that does this? Also include a screen cap of the graph from that speed test.
And how is the ATV connected? WiFi or Ethernet? SMB FTP or a server like plex or emby?
ATV is connected with 5Ghz WiFi.
Infuse is connected with my Plex server.
I’ve shared images in a DM.
This wasn’t an issue before the update to 8.1 - however, my UHD Remuxes were playing as HDR and not DV (as they do now after the update).