Map download won't work on iPhone 11 Pro with iOS 17.0.1 - enters a 'calculating' loop

New offline maps feature seemed to work fine after just installing iOS 17.0.0 (the very first public version including this) and I managed to download the [suggested by current location] 500+ Mb map in a matter of one-two minutes via WiFi. I could even use the map with Carplay for guidance while driving that very same morning but, a while after reaching in destination, the map showed no features (streets, roads etc.), just my location's blue circle on a black background.

So back at home I decided to delete the map and download a new one, which has proved impossible so far. Every time I try, the app shows a map with adjustable boundaries, the message "Calculating..." and buttons CANCEL and DOWNLOAD (this one greyed out) at the bottom. "Calculating..." seems to be caught in an infinite loop that will quickly raise my iPhone's temperature and drain the battery. The app will not even respond to CANCEL. The only thing you can do at this point is kill the app (or switch to another app, which produces the same effect) and reload it, only to confirm that no maps have been downladed, no matter how long you wait.

I updated to the recently released iOS 17.0.1 version this morning in the hope to get the issue solved but no luck. Same behavior.

I am based in Madrid, Spain. Anyone's experienced the same problem and found a solution or workarround?

Thanks!