Unstable Oscillation in Manual/Stabilized mode

Hello,
I have a quad plane with the default settings.
After arming, with low thrust around 0.2, it starts showing unstable oscillations.
Here is the log.
Link: https://review.px4.io/plot_app?log=adf938e2-e868-4727-a368-c954f8ad1875
Any help will be appreciated.

If anyone can help, that would be much appreciated.