I have been able to verify that it works fine on 1.18/1.19 and outputs results, but 1.17 and 1.12 do not output results for example.
Others have been able to reproduce this issue after giving them my reproduction steps.
Someone suggested switching to an older version and it looks like something implemented in Version 2.3.0 broke this, because the version prior to that allows me to exclude biomes on 1.12 just fine.
(Yes, version 2.3.1 is also broken)
I have been able to verify that it works fine on 1.18/1.19 and outputs results, but 1.17 and 1.12 do not output results for example. Others have been able to reproduce this issue after giving them my reproduction steps. Someone suggested switching to an older version and it looks like something implemented in Version 2.3.0 broke this, because the version prior to that allows me to exclude biomes on 1.12 just fine. (Yes, version 2.3.1 is also broken)