Question about Delock HDMI Audio Extractor

I have a similar setup with a Google Chromecast, a beamer and a 5.1 home cinema system, among others. It works there, but if the devices have been in standby for a long time, the power has to be disconnected from the Delock and then reconnected so that I get a picture on the beamer. I can't say for sure whether this is because of the Delock, because I also have an HDMI switch in between.

Thank you for the answer!