[Gelöst] Translation 99% province

Background of the issue:
I am trying to translate the homepage of my site, versteckter Link, using WPML. The translation is supposed to be 100% complete.

Symptoms:
After translating the homepage from 99% to 100% and pressing the save and close button, the page still shows 99% and I cannot publish it.

Questions:
Why does the translation remain at 99% even after saving?
How can I publish the translation at 100%?