Numerical tags are not being recognised.
Panda Version 1.0 (2595)
You have to have another tag at the end of the tag for the numerical ones.
Commenter @Eleanor is correct, you need to close off the number with a hashtag to create a numerical tag - e.g. #2022#
This is the same for the creation of multi-word tags.
A demo of this can be seen here: https://twitter.com/i/web/status/1389621654653898759
Hoping this helps, but if you’ve any further questions let me know!