Good job on the new Kicad v6 release! I see lots of great new features!
I´m having some issues with the Walk around function of the interactive router, where the track seems to get stuck randomly.
I´ve recorded a quick video showing the issue
The problem doesnt show up when using Shove or Highlight collission mode.
This is a sort of known issue ( I think).
Apparently there is quite a lot of delicate programming in the algorithms for the interactive router, and small bugs like this (dis) appear and move all the time.
A quick solution / workaround is to regularly exercise your mouse finger to trigger the button and finalize some track segments, so the interacive router has less track segments to worry about.
Also:
Why are you using “Walk around” mode? The “Shove” is more powerful and usually makes it easier to route your PCB.