Are the main ("purple") rivers not editable?

I have found out I can’t edit main rivers. Well, I can, but changes are not accepted I guess(?) by OSM. I’ve just slightly (nothing over the top) corrected some sharp edges and river bends days ago, but they stay unchanged. I’m talking about “purple” rivers - they turn purple in overpass turbo when selected. Blue ones on the other hand are editable and changes are immediate.

Any clues? Should I leave “purple rivers” alone?

Can you point to an example of a river that you can’t edit? Just the URL of that place would be good enough.

Ok, sorry for messing stuff up. They’re editable - I was checking wrong fragments - reported for delete.