DNS-only A records are resolved to Cloudflare IPs

I have 2 domains on my Cloudflare. Both were working just fine. Now only one of them has gotten weird. DNS-only A records sometimes give me a 1014 error and are resolved to Cloudflare IP addresses. Another weird thing is that none of my MX records are exposed. So, when looking the MX records up, they don't find any. Any idea what could be wrong with my domain?