Not really sure how all these stable coins work but how did a stable coin that is supposed to be equal to one US Dollar go down in price? 
If anything happened to the USDC, it is because there is a lot of FUD that is spreading in the cryptocurrency news, so other community investors are panicking about what is happening in the market.
But from what I can see, usdc can overcome that, I'm sure because it's not like ust, so if you have usdc, don't swap first, wait for the return to 1:1 rate, maybe usdc can solve that.