Weird behaviour discrepancies when Renoise is minimized?

I’m using Basement tool for controlling most of renoise with my MPKmini. Some things don’t seem to work properly somehow when Renoise is minimized though… e.g. the Stop button action should first just stop playback, then when pressed twice move the playhead back to line 00 of current pattern, then to beginning of song when pressed the third time. This works all the time, except when I’m in some other application and renoise is minimized… then when I alt-tab back to renoise the actions suddenly do happen and the playhead is at {pattern=0,line=0}…
Is this a bug? Or is it that some other apps could steal MIDI message focus? I wouldn’t picture that…
PS. using Renoise x64 on Win7 (MT)