Thinking about it, I don't remember seeing a person who has ever experienced a problem while using ChipMixer.
Since the service has been in existence, we would have already seen many and many people talking about it.
That's 5-6 years now...
I have sent chips to Kraken, Binance, FTX, and most Brazillian exchanges for years. Never ever had funds locked or was questioned about where my coins came from. Of course, that could be different if you're sending a huge amount.