1P is now trying to connect to servers in the domain b5dev.com that has its registrant, admin and tech contact's names and details "REDACTED FOR PRIVACY" in WhoIs. The https://b5dev.com website oddly mirrors a version of the 1password.com homepage so doesn't give a clue of the purpose of this domain.
While I guess but don't know if b5dev.com is a creature of Agilebits rather than something to be worried about, why should I have to bother with checking and wondering? Monitoring connections, especially made by apps like 1P, is an important part of security and Agilebits should be striving to make that easy to monitor by limiting domains connected. Recently, 1P also started connecting to appcenter.ms but that was easy to confirm as safe, altho I would have made that connection to a server in the Agilebits constellation of domains which itself should be minimized. Like numbers, server names within a domain are unlimited so proliferation of domains isn't necessary.
1Password Version: 7.5
Extension Version: 184.108.40.206
OS Version: macOS 10.15.4
Sync Type: Not Provided