Tor Browser forgets DuckDuckGo's search when going back on navigation history

When i search something using the default DuckDuckGo search engine i get the expected results. If i click on any link, navigating to it, and then i go back to the previous page (which should be the DuckDuckGo search results) it takes me to DuckDuckGo's homepage and i have to type in again the search terms!

Trac:
Username: wencha

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