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Honestly I am seeing ranking fluctuations in all language markets but am not doing anything about it.

For now I would suggest to just continue doing what you are doing until things have settled down then analyse what has happened thereafter. Doing a change during a change like this could hurt more than it could benefit.

As I understand it they are treated differently. I think the disavow takes a month or two to actually get processed. But do not take my word as gospel, just something i had heard.