SES Shared IP Addresses listed on Spamhaus

I am seeing a fair amount of bounced, undeliverable email through SES today in US-West-1. I use a shared IP address for SES, and the one that seems to be assigned to my account seems to be the culprit.

Most of the returned email has included a specific diagnostic code:

Diagnostic-Code: smtp; 550 5.7.1 Mail from IP 23.251.242.2 was rejected due to listing in Spamhaus SBL. For details please see http://www.spamhaus.org/query/bl?ip=23.251.242.2

However, the link above says that there are no issues with the IP address. A different Spamhaus search, though, indicates the IP address is on the CSS Blocklist.

https://check.spamhaus.org/listed/?searchterm=23.251.242.2

I'm hoping for confirmation that AWS is addressing this issue with Spamhaus.