Our team fixed about 75% of bugs reported in the 20-29 content phase. Currently, that content looks pretty stable and there are no major bugs, so we no longer require the .beta activate command to go further 19.
We will of course keep fixing bugs from 20-29 just like we do with 1-19.
As a reminder, you can always toggle your exp by using the command .xp off and .xp on without any cost.