MIDI chaos when playing in real time - Cub Pro 8.5.20

When I’m playing edrums and there are many fast notes from drum rolls Cubase 8.5.20 ends up in MIDI chaos. The same complex project (with many midi tracks and many inserts of the midi plugin “Transformer” and three different midi devices) is running fine in Cubase 7.5.40
So Cubase 8.5 is not able to be used for complex e-drumming projects :frowning: :angry: . What a shame since MIDI is one of the most important features in Cubase and has ever been. Please fix the midi part!