Why would a guy randomly block me on Instagram after we ended?

This boy I was seeing before blocked me on instagram we never followed eachother or anything he follows his ex’s I noticed we haven’t talking in a year I’m just wondering why I would be blocked and he had gone back to his ex from 4 years ago. Me n him ended so long ago I just don’t know why I would be blocked what’s thay about from a man’s perspective
Why would a guy randomly block me on Instagram after we ended?
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