I'm playing with bitcoind, I'm an started in this subject and I'm playing with the regtest=1 option of course. The thing is that after one day all the transactions are lost, I'm trying to get the balance of some wallets and it's always 0. Is this something related to the regtest mode? has someone had the same issue? If I restart bitcoind again everything is working as expected but is annoying since I have to create a lot of transactions again.