Cannot calibrate the barometer and Plane flying higher than expected after firmware update to v4.4.2

Hello,
I updated the firmware of my VTOL to V4.4.2 lately. However, I was unable to calibrate the barometer after the update.
Another issue that occurred after the update was that the plane was set to fly at a height of 700m. However, it went to a height of 1400m.
Any solutions to how to calibrate the barometer after the update?
And any explanation to why would the plane go higher then where it is supposed to go?