Background of the issue:
On my site, I use URLs that may contain national language characters that are not present in Latin. Accordingly, I translate slugs, among other things. However, I've noticed that WPML can sometimes arbitrarily replace my translated slug that contains escaped national language characters with a slug that contains only Latin characters.
Symptoms:
WPML replaces my translated slugs containing escaped national language characters with slugs containing only Latin characters. For example, %c3%bcberpr%c3%bcfung-der-ausgef%c3%bcllten-beschwerde is changed to ueberpruefung-der-ausgefuellten-beschwerde. Additionally, I get the ERR_TOO_MANY_REDIRECTS error when trying to open the page after saving the correct slug in ATE.
Questions:
Why does WPML replace my translated slugs containing escaped national language characters with slugs containing only Latin characters?
How can I prevent WPML from changing my translated slugs?
How can I fix the ERR_TOO_MANY_REDIRECTS error after saving the correct slug in ATE?