Is it weird how my girlfriend freezes whenever I ask her a certain question and she freezes and says almost nothing for awhile?

When me and my girlfriend are talking she will always answer or respond in a few minutes but whenever I say or ask her a certain question she goes like 4-8 hours silent unless I say something romantic or appealing to her
Is it weird how my girlfriend freezes whenever I ask her a certain question and she freezes and says almost nothing for awhile?
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