Hi @ArekS , thanks for your informative commentary! I have the same experience with my Samsung Galaxy J3 (2017) – the widget is indeed working better & retreveing data when I turn off the 'Saving Mode' on my phone.
Using 12.34 but still see the issues updating the widget. Sometimes location cannot be found, other time the refresh wheel in the top right of widget just remains spinning. Need to remove and add widget again to address the issue.
Sometimes I note the temperature is way off compared to reality. It's just a case of the app hasn't refreshed correctly.
Love the app. When widget issues solved, it will be the best. :)