Driver 20.5.1 has same behaviour.
AMD should have known this but why not fixed it, its problem since early Radeon Software 2020 in December 2019.
My Vega 11, Vega 3 not having this with Radeon Software 19.11.3 installed.
there's already an answer, https://community.amd.com/message/2972396 , we just have to wait