Verify custom domain

I use gitlab repo - all is ok
I registered custom domain on CloudFlare - it works
My site is protected with DNSSEC.

But if I setup in gitlab custom domain( Pages Domain) I see errors:

  • Failed to verify domain ownership
  • This domain is not verified. You will need to verify ownership before access is enabled.
    If I link my repo from gitlab to cloudflare it compile and my custom domain works good
    BUT after (7 apr days) in Gitlab my custom domain unlinks and my site unavailable
    I need setup custom domain again and again in Gitlab I seeā€¦ Failed to verify domain ownership