Dashboard keeps disappearing for different admins

Hi, we are currently testing some WPMU plugins. This website is multisite network and is currently managed by me and another colleague.

We are having some issues with the WPMU DEV dashboard, it seems it can only be visible to one of the admins. If I run "Network Disable" and "Network Enable" I can see the WPMU dashboard but then it will be missing on my colleague's panel. If he repeats the process then he can see it but I won't.

Any tips about this?