You are getting pretty close to dangerous temperatures. DuPont says, "The recommended maximum use temperature for cookware with Teflon® nonstick coating is 500°F (260°C)." (link
I wouldn't get Teflon anywhere near those maximum temperatures without some food or liquid in the utensil.
Just noting, your self clean cycle may be stated as 250C but how accurate is that? And also, different coatings have different maximum temperatures. I have no idea what material your Woll uses. Maybe it's good to 250C, maybe not, and your oven may go higher than stated.
By the way, I'm just amazed with self cleaning ovens. My Wolf electric convection oven self cleans at 500F (they say) and a 4 hour cleaning cycle which I'm sure includes up to maybe 2 hours of cool down. Recently I had neglected cleaning my oven and there was baked on stuff all over the place, enough that I know I was insulting my fine oven, but I went ahead and removed the racks and ran it through the cleaning cycle, and when I opened the door I was amazed so see practically nothing except some grey powder. Still being lazy and now in a hurry I just replaced the racks and cooked dinner.
This self cleaning is really great! All these years I had never known that all my hours with my head stuck in an oven with Easy Off could have been avoided by getting a good stove. And convection? If I had known how valuable convection cooking is I would have bought a convection oven decades ago.