That's what happened on ALL my Onkyos, that's when I switched to Denon. Been solid and stable since then (*touch wood*).
After a bit more reading I came across what @mrcorbo summarized for us, that nothing fully HDMI 2.1 in 2019 with the only hope of the flagship AVR 8500 being upgradeable through likely expensive board replacement in 2020. Everyone else seems to be on a MidYear 2020 timeframe for HDMI 2.1 delivery.
https://www.avsforum.com/forum/90-r...-where-all-hdmi-2-1-avrs.html#/topics/3061882
After a bit more reading I came across what @mrcorbo summarized for us, that nothing fully HDMI 2.1 in 2019 with the only hope of the flagship AVR 8500 being upgradeable through likely expensive board replacement in 2020. Everyone else seems to be on a MidYear 2020 timeframe for HDMI 2.1 delivery.
https://www.avsforum.com/forum/90-r...-where-all-hdmi-2-1-avrs.html#/topics/3061882