Agreed!
In this case, the bug was reported on Aug 24 2018 by Adrian Bunk. It was removed about a months later, namely on September 23, for failing to build from source. Four weeks is arguably quite fast. Or quite slow, depending on whom you talk to.
I probably could have reacted by disabling the test suite. Or by prodding you in those four weeks harder. Or at last have the bug fixed by end of last year, which would have left enough time to re-migrate to testing. In the future, I'll know better.
Again, sorry. I'm happy to help with getting the package to buster-backports once it opens.
-rt