Can't update sunrise and senset times in KDE Plasma 5.15.5

AutomaThemely isn't updating the sunset nd sunrise times when using the UI in KDE 5.15.5 (KDE Neon) as shown in the image

Steps to reproduce it:
1) install AutomaThemely using the file provided here
2) Set the Look and Fell for Plasma and GTK in both light and dark tabs
3) Set it to get Automatic location
4) Press "Save" (the application closes)
5) Update the Time Offset (in minutes) field (in this case +60 for sunrise and -for sunset)
6) Press "Save" again (the application closes)

Expected behavior: AutomaThemely changes the theme of Look and Feel and GTK properly as configured
Found behavior: It still uses the old sunset and sunrise times

Below I've attached a screenshot with my case, the sunrise and sunset is still as it was in summer saving time even though I've configured it to update and use one hour earlier for sunset and one hour later for sunrise:

Start by reproducing the issue in the KDE Plasma UI using the listed Save and Time Offset steps, with automatic location enabled. Trace how saving the sunrise and sunset offsets is handled, then verify that a second save changes the scheduled theme times instead of retaining the previous values.

Written by the indexing model from the issue text.