A minor problem with DuckDuckGo search engine:

[Admini]

The personalized DuckDuckGo homepage's URL that I have created and used for many years through "Ξ > SETTINGS > Other Settings > (my personal configurations) > Show Bookmarklet and Settings Data"  is as follows:

https://duckduckgo.com/?kl=tr-tr&kad=tr_...ao=-1&kg=p

The personalized DuckDuckGo search engine's URL (for Chromium-based browsers) I have created using the homepage's URL above and added to the browsers for many years is as follows:

https://duckduckgo.com/?q=%s&atb=v36-2b_...ao=-1&kg=p
 
Therefore, there is no difference (incorrect parameters) between this URL and the URL that appears in the address bar in the image I added above (the ones that appear at the beginning of the address bar are search words).
And all the extensions I am currently using are aged like myself; but they are all up to date.   
There was no such problem in older versions of Cent Browser; it is starting to appear in the new version.

Additional info:

It does not occur after every search: Sometimes it occurs directly when you click the "Enter"  button after typing the search words; sometimes it arises as follows:

When you scroll down the page that shows DuckDuckGo's search results with the scroll bar or the mouse wheel, the problem arises when it comes to the middle of the page. I just realized that the "Reload" button also works on the problem occurred page.

Thanks for clarification.
Have you tried running the browser with safemode.bat?