Another domain name is shown in plugin update notification emails

Hello,

I have a blog at [devpower.co.uk]). Sometimes I get plugin update notifications with a different domain: [https://vectorwebcam.aprilvuong.com/]) (Attached a screenshot)

I have no idea what this domain is or why it’s pointing to my blog. Most importantly why I’m seeing this in my notification emails.

Sometimes it shows the correct domain name, sometimes it uses the IP address and sometimes this unknown domain.

My blog is behind CloudFlare.

Can you think of a reason for this happening?

Thanks.