sysex messages not received

cubase 8.5 does not seem to receive/record sysex messages? I did disable their filtering.

to reproduce my steps:

-open midiox (receives from synthesizer, forwards to loopbe virtual midi patch)
-open cubase
-create new project
-make sure filtering is disabled
-add midi track
-add midi monitor plugin
-play notes on synthesizer: monitor is showing notes
-in midi-ox send a sysex message: monitor is showing nothing

any ideas?
Screenshot (3).jpg

so… I suppose this is somehow very difficult…? :frowning: