Yes these are known.
Unity 2021.2 is still in beta so it isn't stable yet.
And since this is a complicated error that we believe Unity caused by mistake we are waiting to see if they will change things before 2021.2 comes out of beta. If the error persists even then we will fix it asap.
In the meantime I highly recommend you use an LTS version of Unity whether it is 2019.4 or 2020.3. These are the most stable Unity versions.