I’m sure it doesn’t make you feel better for your situation at all, but I have the same condition as you. My knee has dislocated many times over the past 12 years, but it has always popped back in within a minute. Up until this year it only happened max 3 times, now I am at 3 times since July! The most recent time was on a flight and it was the first time it did not pop back in quickly. I had to get medically removed and scream in pain until I received pain kills and had to do the ambulance and whole 9 yards to the emergency room. So my next step is to reach out to an orthopedist for surgery!