There is a known issue where people who started using Mercury at version 1.6 don't stay logged in. There is a fix on its way that should be out shortly!
Anyone effected might also need to de-authorise previous versions of Mercury from their account so as to not receive multiple notifications — https://your_instance_domain_here/oauth/authorized_applications
This Mastodon instance is for people interested in technology. Discussions aren't limited to technology, because tech folks shouldn't be limited to technology either!