I am seeing the same...never noticed it because I never touch my physical dimmers.
This seems to be related to the problem I posted here:
If you look at the logs, the last update that the bridge sends is a brightness level of 0.01
As per @bravenel, there isn't anything that can be done to have this 0.01 brightness register as anything other than off. Not sure I understand why myself, but since it doesn't affect anything I use it for
