Site down exactly one hour twice due to massive amount of redirects

During the last month the site has gone down for precisely one hour twice; Aug 19 at 8.48-9.48 am, and Sep 14 at 10.40-11.40 am. The cause is a massive amount of redirections. When we look at the hub, it's said to be up and running since Aug 3. Do you have any ideas about what can cause this? We are using several of your plugins. I've granted you access.
Grateful for any help!