I think you made a mistake by doing the mixer service and then using an exchange wallet. It is clear that centralized exchanges have a rule of not accepting deposits from the results of the mixer service because this violates their rules which they consider to be money laundering.
Unless the mixing service is very poor (and as my last test,
YOMIX was not) it is difficult or almost impossible for any exchange to be certain that deposits came from a mixer that works in the same way as YOMIX does.
All they will do is analyze the last 10 or 5 transactions, and if they are related to activities such as casinos, addresses on the blacklist, or others, your transaction may be marked badly.
Therefore, unless a careful analysis of your account is carried out, it is difficult for your account to be frozen simply because you used a mixer.