Hi @afladland, you may notice I moved your discussion and combined it with one titled: What caused my knee to buckle? https://connect.mayoclinic.org/discussion/what-caused-my-knee-to-buckle/. I did this so you could meet @td29 who posted their similar experience as well. @td29, how are you doing now that a little time has passed? Are you still experiencing the buckling feeling?

@afladland, have you discussed this recent development with your surgeon? You mentioned you are getting progressively weaker, was your initial rehab more successful and did it have gains instead the recent losses?