I don't know if it's related to the server or the Win10 Theater (client), but when streaming in-house I typically start with direct (no transcode).
I can change to a transcoded rate. a slight delay, then the stream resumes using the new (reduced) bitrate.
The second time I change bitrate on the same show, it seems to hang (not resuming). The colored waiting circle keeps spinning.
Sometimes I can click the back arrow (up, left) to go back, and then click play again.
Sometimes, it really hangs, and I need to re-start the Theater client (waiting circle keeps spinning).
Transcoding is not HW accelerated on the server.
any ideas why this happens, and how to solve?