In GUI wallet is set "Wallet creation height:" above block 1527333 and we are at block ~39000 only, after change to 0, wallet re-scanned and show correct balance. So there is an "issue". GUI wallet should not set "Wallet creation height:" to that big number. Maybe is some settings in source for that...
After the address of the paper wallet is changed into the address of the core wallet, the old excavated coin is not in it. How do you extract the money from the paper wallet?