I think binance has different ways of treating same issues, I've once received funds from a client which I suspected was sent through mixers or a flagged address,
You never should receive your job payments directly to your exchange account because you can not control origins of your payments that can cause issues for your account on a CEX.
Your post sounds like contracting itself, and I don't know how did you feel that payment is from mixers like you wrote. Honestly, except if I am working for a mixer company in a signature campaign or any marketing programs for them, I never know if I am receiving my payment from a mixer. In case you are working directly for a mixer, it's more stupid to receive payment directly to your CEX account.
Each problem will certainly be handled with a different approach. When you prove with evidence of a conversation confirmed valid by support, then everything will run smoothly.
There are also cases of exchanges that have problems with deposits and withdrawals of funds to casino accounts. Some may not have a problem with it, but it seems like someone shared it here regarding the warning received from the exchange due to problems with withdrawals to casino accounts.
Conversations are hard to be used as a proof of your fund origin. It must be on-chain proofs and a source link of a website, a marketing program thread for example.
You can not send any CEX a screenshot of your Telegram chat, Discord chat as proof of your fund origin.