Yeah, I figured as much and it was only noticeable on my TV.
Since you mentioned the RK3576 boards, I was reading this: https://forum.openwrt.org/t/friendlyelec-nanopi-r76s/236429
From a performance and cost standpoint it is less powerful than the R6C/R6S but more powerful than the R5C and R3S. DTS files for the Rockchip RK3576 are already in the mainline kernel so it shouldn't be difficult to get OpenWRT running on it either.
Just curious if this also applies to LibreElec ?
Came to this post as it mentions R3S
There is the NanoPi R3S LTS which has HDMI on RK3566. See https://www.friendlyelec.com/index.php?rout…&product_id=311
Any chance it may ever be supported by libreelec?