Our VST3 synths are currently not getting MIDI input from Bandlab’s Cakewalk. The problem is that this is the only host that does not call IComponent::getBusInfo(type, dir, index, bus) with a type == MediaTypes::kEvent.
In other hosts like Cubase and Studio One, all expected callbacks happen, like IComponent::getBusCount(type, dir), IComponent::getBusInfo(type, dir, index, bus) and IComponent::activateBus(type, dir, index, state). This happens also for the MIDI event bus, but not in Cakewalk.
But I could see that other VST3 synths are working well in Cakewalk, so there must be something that we are not implementing well, but I do not know what it could be.