Fixed in v2.12.2 so still impacts the Train UCA (2.12.1 currently).
Earlier releases should not have this issue as don't contain the commit that regressed this feature.
$ git tag --contains a0baa7dfa4fe
v2.12.0 v2.12.1 v2.12.2 v2.12.3 v2.13.0 v2.13.1 v2.13.2 v2.13.3 v2.13.4 v2.14.0 v2.14.1 v2.14.2 v2.15.0 v2.15.1
Fixed in v2.12.2 so still impacts the Train UCA (2.12.1 currently).
Earlier releases should not have this issue as don't contain the commit that regressed this feature.
$ git tag --contains a0baa7dfa4fe
v2.12.0
v2.12.1
v2.12.2
v2.12.3
v2.13.0
v2.13.1
v2.13.2
v2.13.3
v2.13.4
v2.14.0
v2.14.1
v2.14.2
v2.15.0
v2.15.1