When focus is lost the midi channels seem to reset (The song isn't reset), same thing happens when focus is restored. Most notable when there is a long note playing as it will be cut short when the channel is reset.
Windows 10 x64
When focus is lost the midi channels seem to reset (The song isn't reset), same thing happens when focus is restored. Most notable when there is a long note playing as it will be cut short when the channel is reset.
Windows 10 x64