The first test was in a calm weather and I didn't experience this BARO problem. So I will cover the flight controller to avoid violent air movements and see.
Before this tho I am working on the GPS to hold the code when unplugged. Looks like the battery that preserves RAM is depleted. I detached the original tiny battery and tried it with another 1.5 V battery no luck but the second test with a 3V battery is more promising. I'll wait a day or two and see if it reverts back to the original code or not.