Part 107 UAS pilot reported a fly away occurred for several minutes while attempting to land the UAS. Pilot regained control and landed the UAS.

Narrative

I was flying my DJI Mavic 3 Pro; making sure to stay below the max altitude listed in the DJI Pro Controller for that airspace. At XA:00; as I was bringing the drone in to land; all of a sudden it started going up instead of down to land. I let off the stick and then tried again - but nothing. It still kept rising further and further. My first thought was that somehow the controls got inverted; so I tried pushing up - but same thing; it just kept rising. I have a 393ft max altitude set in the app - but it blew right past that; continuing up to 3451ft. The controls would allow me to rotate the drone; but not move in any direction; and I could not control altitude. I tried to force a return to home; but that didn't seem to work. I also tried to hit the land button - but that too did not work and it still kept going up. Finally; a notice popped up saying it would automatically land. I kept trying to force it to land with no effect - finally; the auto land kicked in and it started coming back down. The flyaway incident lasted 6 minutes.Once it got back down to where it had been when the flyaway happened (about 138ft); the controls started working again; and I was able to land the drone safely and control it in all directions.No aircraft were seen in the area (or showed up the map) so there should not have been any safety issues outside of going above approved airspace. POSSIBLE CONTRIBUTING FACTORS:1. I had clipped a tree with the drone several weeks earlier; after which I repaired one of the rotor arms. After careful testing out in the middle of nowhere on a farm; it seemed to be flying just fine with no issues; so we continued to use the drone as usual. 2. About a minute and a half earlier in this flight; I did nick the top of a tree; though it made the drone bump; it didn't knock it out of the sky. And after stopping in flight; the drone seemed fine and so I then controlled it to come back for a landing.3. I was within eye distance of the drone; so the controller connection should not have been an issue.ACTIONS TO TAKE NOW:I plan to send the drone back to the manufacturer for diagnostics and repair.