crunching, Scar tissue breaking up or something else?

Hi all, something new happened in the my knee and I was hoping someone will have insights. I am 1 year post injury (full acl tear, major damage to mcl and a crack in tibia) no surgery due to recommendation of sports doctor and PT. I had a pretty good week, skiing, cycling on a trainer and trail running. I was running down when I started feeling stuff crunching, almost “falling into place” for a lack of better description. It didn’t hurt but i did feel it and it almost felt good in a painful message kind of way.

I felt a tiny bit of buckling but it went away after a few seconds. The knee now feels different a little weird and a little weak but I managed to do my usual strength exercises, I have full stability, I can jump on one leg from side to side, slackline, the works but something still feels a bit weird/different.

Any comments or experiences from the community? I will go back to the doc if i have to but it is a bit of a hassle cause I am in a different country