Lightroom : Blurry Preview in Develop module

Blurry image in "Develop" module

Hello everyone, I am new to Lightroom and have encountered something that seems rather strange to me. When looking at images in the "Library" module, everything is crystal-clear and sharp. Whenever I change to the "Develop" module, however, the image I am looking at gets noticeably blurrier. It just...

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