"Looks to me like a bug in Live, when automating integer AU parameters with a negative range. The transpose goes from -24 to +24 and it looks like they reset it to the smallest?"
from this thread at KVR were i reported the problem first:
http://www.kvraudio.com/forum/viewtopic.php?p=2147893
There is no automation on the track, so whatever automation bugs there are appears without any user created automation.
It feels a bit silly being the customer working as the communicator between two companies were something doesnt work, but anyway. Would be nice if it was sorted, and somebody takes responsibility

The workaround is; undo the operatin, and try do it again. Sometimes it works fine, but i have experienced situations were the only workaounds is to recreate the contents of the clip manually (instead of copying)
Using 6.0.1 and latest Z2