I opened up Dorico in Terminal.app trying to track down a separate issue that I had and I noticed a few missing signal/slot connections (caveat: I am a Qt programmer). I thought I’d list them here, in case you wanted to track them down (though I suspect they also come out in your terminal and you also have likely tracked them down (in which case, I apologize for being a bother).
qrc:/Dorico/Hub/HubOpenRecent.qml:91:5: QML Connections: Detected function "onModelTypeChanged" in Connections element. This is probably intended to be a signal handler but no signal of the target matches the name.
QObject::connect: No such slot Steinberg::Steam::AutomationBackgroundItem::drawDataChanged() in /Users/Buildserver/Builddata/re/327125690/b/steam/playmodequickui/source/items/playmodequickitems.cpp:2067
QObject::connect: No such signal DoricoDoubleSpinBox::focusLost() in /Users/Buildserver/Builddata/re/327125690/b/steam/source/backend/qt/controls/qpropertywidgets.cpp:487
In addition, my team just recently changed a bunch of the C++ string-based signal/slot connections to the functor-based connection types and I highly recommend it, should you have the bandwidth (in-between feature development). In that case we get compiler errors when they are not connected.