Once I have logged into QuickBooks online for about 30s or 1m, the site reloads and/or re-logs-in. This happens the same way in both normal and compatibility mode.
I expect the site not to reload. This also happens in the RC Version 0.99.132.1.2-rc (WebKit 621.1.2.111.4)
Version 0.99.132.0.3-beta (WebKit 621.1.2.111.4)
Sequoia (15)