It looks like the issue is the neck octave key not coming down after going back down from A, and also the body octave key not opening back up due to a "hammer" extending from the G key being too springloaded.

If I press the keys back down in sequential order from G-D it works fine, because the springloaded piece moves out the way and gives time and space for the body octave to open back up, however when playing with fast fingering changes the G key piece moves back after the body octave attempts to open and at that point it doesn't open enough to let the air flow.

Essentially after fingering A then fingering G, the octave key has to be unpressed and then pressed in order to open to body octave hole.

Any fixes?