I realy think that you should address your concerns to qmidiarp developers (Frank Kober? he used to be strolling around here back then :))
on the tests I've been dealing shortly, with latest git head (--enable-qt5, btw.) Arp LV2 at least, often crashes randomly and yes, it doesn't seem to play well on export rendering (jack freewheel mode, faster than real-time) and also, the first note on playback or loop start, regardless of its location in the timeline, is simply ignored--all that to just confirm all of your findings.
note that i am not dissing a bug on qtractor, no way! i'm all full-ticking and willing to help, you and possibly qmidiarp devs.
I realy think that you should address your concerns to qmidiarp developers (Frank Kober? he used to be strolling around here back then :))
on the tests I've been dealing shortly, with latest git head (--enable-qt5, btw.) Arp LV2 at least, often crashes randomly and yes, it doesn't seem to play well on export rendering (jack freewheel mode, faster than real-time) and also, the first note on playback or loop start, regardless of its location in the timeline, is simply ignored--all that to just confirm all of your findings.
note that i am not dissing a bug on qtractor, no way! i'm all full-ticking and willing to help, you and possibly qmidiarp devs.
cheers && thanks again.