Here, or the discord server to get a faster response.
Not a bug, it's just that the explore system recieved a fair bit of complaints, so the "places you remember" carry over all your saves (provided you have the same persistent file).
Meaning that if you visit it once, even if you don't save, the game will still remember it.
This may or may not make it into the final version of the game, like the money cheats.
Depends on your platform, if you're on Windows, Mac or Linux, it's recommended you use the itch.io launcher to download and update the game. But even if you don't, your saves should be automatically detected once you run the new version of the game, just don't extract the content of the zip files over the old version of the game, weird stuff may happen.
On Android though... No dice, you have to download the APK each time. And if it doesn't update you may have to backup your saves, uninstall the app and install it fresh so then you can move your saves back in.