Oh okay I see what you mean however I have a space in my location and it works fine. The plus sign is technically a space in a URL and I assume that was vestigial instead of encoding it for the weather button. Anyways, either works fine now.
Edit: I just tested, and if you have a space in the location the native OpenSprinkler’s UI weather button won’t work. Thanks for the heads up on this. I might just convert space to plus signs to alleviate the issue/confusion.