DJM450 only picking BPM from one deck when connected to Rekordbox

Hello,

I have 2 XDJ1000MK2 and a DJ450 connected by USB hub to a macbook running IOS 10.14. everything works fine as expected. However, the DJM will only detect the BPM of the first deck I start playing. When I go to the other deck DJM does not update the BPM according, only for the first deck.

Is this a known bug or something wrong on my setup? everything else is working fine, just the BPM detection issue.