What ammo was being used?
If you were using anything but brass cased, yes, you will have some problems with Walther.
The Wolf (and others who are not using brass) cover the casing material with an epoxy material. That material hangs in the chamber as the firearm gets warm from shooting. Shoot a firearm 3 times and see how hot it gets. Removing a stuck shell allows time for it to cool.
Try different ammo (brass cased) next time and you may have a more pleasant experience.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
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Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)