DirecTV Stream on Roku - Hangs When Flipping Through Channels

We have a brand new Sony TV with a brand new Roku Ultra 4k and 100mbps fiber internet. We are finding when flipping through channels using DirecTV streams app that there is a hang while loading video from time to time. If you wait on this hang, it will eventually load the video (several minutes later) and if you flip to the next channel and back, it will load video almost instantly. Once it happens the first time, it tends to happen more frequently when changing to other channels, though a reboot of the Roku solves the issue temporarily.