Game downloads ~5GB of 'something' everytime I launch the client.

Like in the title. I didn't switch regions, didn't do anything actually, and yet the game downloads something EVERYTIME I launch the client. It started 4 days ago, the "full repair" from riot is not working. Any ideas? Or do I have to wait till next patch and hope it will be fine again? {{sticker:slayer-jinx-unamused}}
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