I have the same problem with minimote and lights. The first button push works for any button, then subsequent ones do nothing. If I wait a while, another button will work, but the previous one, or any other do not work. I have not run the experiment on how long to wait but it is definitely many minutes.
I noticed this started last night 7/21. Affects all my minimotes (5).
Summary: first button pushed of any of the 4 work. Subsequent buttons pushed, or the same one, do not. Wait TBD, the first button of any of the 4 pushed, which can be a different one, works just one time.
hub firmware version: 000.022.00013
hardware: hub v2, US customer Rev E