Displaying Custom Block Page with TLS Decryption turned ON

What is the name of the domain?

example com

Additional information

DNS policies

What is the issue you’re encountering

Custom Block page is not displaying with TLS decryption turned on.

What steps have you taken to resolve the issue?

We have deployed WARP with the Cloudflare CA certificate. Our custom block page displayed when people visit a blocked page works. However, when we turn on TLS Decryption, the custom block page doesn’t display. Any advice?