It's a Laravel setting. When you are already logged in and try to access https://app.monicahq.com/ or https://app.monicahq.com/login etc., redirect to https://app.monicahq.com/dashboard instead of https://app.monicahq.com/. That should fix the endless loops.

Edit: https://stackoverflow.com/a/32130028/82135 might be what you are looking for.