Does OKX Recurring Buy/Convert really charge ~1% above the market price?

I recently noticed something that doesn’t seem right and wanted to see if anyone else has experienced this.

I have a recurring BTC buy set up on OKX. My latest purchase converted **20 USDC** into **0.00030894889 BTC**, which works out to an execution price of **64,735.63**
**At** 16:54 CST for BTC USDC convert

At the time my order executed the OKX BTC USDC spot price was around 64100 but I got filled at 64735 almost 1% higher. I know Convert has a spread but 1% for a $20 BTC buy seems crazy. A normal spot market order shouldnt have anywhere near that much slippage.