I'm not sure if this is a bug, a new limitation of the addon or if I'm missing something, but that is what I get with all committees released after the 0a895ec7befd when I try to import poses. A lot of them don't work correctly.
Here is a pose I like to use as a test. commit 0a895ec7befd (Good result)
And here is what I got with the latest committees included the last one, d59985148dde.
Tested with blender 2.83.6, 2.90.1 and 2.91