HDMI output drops

I checked the forum whether a topic like this already existed of not, but could not find it. So I will describe my problem in this new topic.

I have installed a Crucial M.2 NVMe PCIE3, 4Tb in my DMP-A6. That went well, copying my music collection (7,600 albums, almost 72,000 music files) to the SSD went wel too. I have only a couple of SACD albums in my collection, one of them has 6 channel music. The majority of my collection consists of FLACs.

I connected my DMP-A6 to my ARCAM AVR20...

HDMI output drops