Adding subdomain "" is too long to propagate

Hi Cloudflare,

We have a trouble when we’re trying to add in Cloudflare, is taking too long to propagate.
are CF have limitation for subdomain “apps”?

Thank you!

As far as I know, there is none.

May I ask have you tried using a different Web browser, or tried clearing your Web browser cache?
How about using a Private window (Incognito mode) or a VPN connection if possible?
Is it the same behaviour on your mobile phone (4G LTE, mobile data, cellular)?

Have you got a valid SSL certificate for your sub-domain? :thinking:

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