It shows me A timeout occurred Error code 524

Bluehost is my host.
My Cloudflare domain was connected a day ago.
This error appears and disappears from time to time, and I do not know the reason.

When I contacted Bluehost support, they told me to update the A records to
Host:@
Type:A
Points to: 162...*
TTL: 14400

But my TTL appears automatic in cloudflare.

(continued from here)

We saw some intermittent issues before.

Is that the only IP address you have for A records in your DNS?

If in doubt, you can post a screenshot of your DNS settings.