Magic Earth GPS doesn't work when offline

I was on a trip, and I wanted to figure out where I was, without internet access, and suddenly the app said that I was still at home, while I was 150km from my home.
When I got internet access again, it updated, and showed the right position…
Can I use the GPS of Magic Earth when I’m offline?
I tried the location with and without Wi-Fi, and Bluetooth, and nothing fixed it, except Wi-Fi connection.
Btw, I’m using a Murena Fairphone 4 with Android 11

I’ve just tried in flight mode (WiFi, mobile data and Bluetooth off) and got a fix in magic earth at once. Same device as you.
Are you sure you’ve gps enabled? Maybe your WiFi was just used to locate you instead of using GPS so enabling it helped therefore in your case?