I have a My Cloud v04.00.00-607 firmware and WD TV with v2.02.32. But this happened with previous firmware versions as well.
Sometime the WD TV will say the WDMC has disconnected, and do I want to connect to something else. When I go through the steps to connect to the WDMC again, the WD TV goes into an infinite loop trying to connect (the TV screeen flashes light and dark).
To fix it, I have to reconnect the WD TV to the network. Then it connects to the WDMC fine.
Wasn’t sure if this belonged more in the WD TV forum. But since I don’t remember this issue with my previous My Book Live, I thought it might be a WDMC issue. In any case, I hope the mods will make sure the right techs see this.