Ex girlfriend unliked all my posts?

As of last week, my ex and I have been broken up for about 2 months. We dated for about 8. Anyway, when we broke up we decided that it was best for us both to have space, but there was possibility for reconciliation. Today I look through my photos and realized she's unliked them all. I know this was done recently , because I get bored and look through old posts often, to just relive old moments. I did this just 3 days ago and her likes were still there. We also agreed to be friends and have conversed platonically, so I don't understand this.
Ex girlfriend unliked all my posts?
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