Hello,
We have been reviewing your case, we have found that ip (87.4.21.127), had too many login and connection failures.
Please, review your devices’ configuration to avoid creating new connections in a fast manner when a failure (login or similar) is found, introducing a pause between retry (about 15 seconds should be reasonable).
After you have everything corrected, let us know to remove restriction.
Also, consider upgrading your Open Hub to a plan with subscription: that way you can receive reports about blocked ips that might be associated to hubs creating connection errors or order behaviours not allowed.
Automated blocking does not generates internal notification for us to review in case it is found they are associated to MyQttHub Open Plans.
Best Regards,