Admin role is unstable

Hi everyone,

I made an app for my company and I'm currently facing a weird bug. I gave the admin role to a few other people via the share app dialog box and for most users, I manage app access via google groups, via the Security < Domain authentification page. The admins are also part of those groups on top of being given access via the share app dialog box. I read in the documentation that the share app dialog box has priority over the google groups and anyway, the first group in the list of google groups is an Admin group.

Within the app, some view are only accessible to Admins. I used the very simple "Userrole()='Admin'" condition in the 'Show if' section. 

It works fine 90% of the time but sometimes, for no apparent reason, these admins become regular user, the condition Userrole()='Admin' returns false. I have contacted the support but they do not know what could be the cause.

Has anyone ever had this issue and found a solution ? Thanks !