Unexpected Banking Before Back Transition


I am experiencing unexpected left turns before reaching the decision WP (the one before VTOL Land waypoint). The banking is always to the left.

Example Log-1
Example Log-2

Anybody has an idea what might cause this?

May altitude error cause it to loiter around the decision WP before continuing to VTOL Land WP?

Turns out it is due to altitude error. I made the approach more flat, and the problem was solved.