What do you mean why am I aksong here? Because this is the receiver forum...
I've tried the above mention outside of a hard reset. I initially thought it was my projector so I asked over there first. Once I isolated the issue to the receiver I came here to see if there is anything else suggested to try and fix it before I send it in for warranty repair.
Manufacturers decide, not public opinion. If you call tech support, they may be able to get you through making it work faster than posting here and waiting for replies because they have heard of this particular problem more often than anyone here. Unless you're me- I couldn't begin to count the number of times I have described a problem and was told "I have never heard of this, before".
HDMI is going to be problematic for as long as it's used, IMO. It has a very narrow margin where the "handshake" works, or doesn't, an the window is .3V. It's not very fault tolerant WRT connection quality. How old is the cable? It can matter because what is being demanded of them now, isn't what was demanded of them when the format came out.
I have been told by several manufacturers that hot-swapping cables as a way to reset the EDID is OK, as long as it's not continuous. Maybe this would work for yours.
How old is it less than 2 years? Most manufacturers had HDMI board problems a few years ago and some just take longer to show up.
Any tight bends in the cables? Have the cables been inserted/removed often? Oddly, HDMI was never intended for frequent connect/disconnect.