I have no doubts about security and avoid giving my card credentials to random merchants it's exactly my use case for PayPal, but I still got account randomly l

I have no doubts about security and avoid giving my card credentials to random merchants it's exactly my use case for PayPal, but I still got account randomly locked several times over 10 years. What exactly caused it I have no idea, but might be traveling or using VPN. Once I tried to make fairly big $2000 transaction to pay for my new laptop and spent a week re-verifying my identify with them.