Re: your zsh experience, it's hard to judge exactly what's happening from your comment but we have had other users where the state of activation was suppressed by themes which can cause "environment already active". https://github.com/flox/flox/issues/637 - if you think it's something else or have more detail to share, let us know (either here, github, anywhere).
Re: fish, saw you found the issue someone else opened on it. We have it on our plan and will be adding support soon https://github.com/flox/flox/issues/1173
Re: your zsh experience, it's hard to judge exactly what's happening from your comment but we have had other users where the state of activation was suppressed by themes which can cause "environment already active". https://github.com/flox/flox/issues/637 - if you think it's something else or have more detail to share, let us know (either here, github, anywhere).
Thanks for trying Flox!
(Flox employee here)