Ok I have discovered something very interesting

Everything works fine if the item being retrieved from the URL has no odd characters and no spaces. If a space is introduced to item in the URL, the “Get from URL” will write in the database a blank entry.

For example:

country=USA will write as USA

country=Great Britain will write as empty because of the space

country=Baden-Württemberg will write as empty because of either the “ü” or the “-”