Last week emptied black tank. The tank drain valve didn’t seem to go all the way in but I pressed it hard and thought it was normal. After a tailgate I went to empty the black tank. As I took the plug off waste fluid came gushing out. I quickly got my drain hose on so was mildly filthy. As you can see in photo I can’t get waste drain valve all the way in. Feels like some resistance. Winnebago 2022 Adventurer class A. Thoughts?