I have a TV setup with 500+ TV channels. The DVR Setup correctly pulls the channel list, and the EPG loads from the server. But then I get unresponsive web page for many minutes, whilst creating a channel map. After which there is an error and the tuner is not loaded. I am able to filter channels from the tuner, and then it loads, however I want to have access to all channels.
I have not found any documentation that says there is a channel limit, so assumed that this setup should work. PS Emby handled this without issue.