Plane flying inverted after taking off in FBWA mode

ArduPlane Plane 4.5
1

Hello everyone,

help needed on the possible explanation of strange behaviour when taking off in FBWA mode, the aircraft is flying inverted shortly after taking off. For context, the aircraft is hand launched in low wind condition. previously, the aircraft haven’t had this issue. the aircraft does not recover from the inverted flight, eventhough there is a roll input from the transmitter. what could possibly cause such issue?

any help will be appreciated

attached logs

thank you

2

control surface direction?

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