I am running the latest version of Infuse Pro (5.4) on my iPad Pro 9.7. During playback of movies with a dolby true 7.1 audio track, I experience permanent rebuffering issues (i.e. the small spinning circle showing up) every 12 to 15 seconds. When switching the audio track to regular Dolby 5.1 or DTS 7.1 (when available) playback is fine.
My WIFI (consisting of a 5 GHz setup) is running without problems and I have never experienced any issues besides those.