Character not responding

Hey so I've seen tons of posts of lag spikes and screen freezes and I'm not 100% sure if this is different to those but it feels very different. My character sometimes doesn't respond to movement clicks and attack clicks. Like I can clearly see the clicks go through as the green or red animations occur but my character will just stop responding to them. P.S I do not have any background apps like Blitz or Porofessor. This has only started to happen since latest patch 9.23. I've also checked and its not my laptop nor my internet as my brother can play all his games normally without a problem. Any ideas on what this is (I know it sound like packet loss) or how to fix whatever this is?
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