Since the last version of Infuse, the playback of content in the AppleTV app via ethernet stops continuously during the first few minutes.
I use a NAS with Samba and the first thing I thought was if I would have problems with it, but playing the same file from an iPad Pro via wifi plays without problems.
Are you aware of any similar type of error by other users?
What version of infuse?
What version of tvOS?
Can you submit diagnostics code here?
Did you try restarting the Apple tv.
You could try changing the smb mode in share settings.
Can you do a speed test on a file and see if it will complete?
This and also post a pic of the graph from the speed test along with the min max average speeds?