Tenancy Admin users login profile stabilty

I have inherited our organisations Auth0 administration, while our oganisation (tenancy) has experienced nearly 70% turn over. With very limited experience and knowledge on Auth0 as an application I continued to follow users historical setup from views, adding all internal team members into our Tenancy with Admin rights.
Users have started experiencing login issues where a new security recovery key is issued everytime they login or some loss their link to Auth0 completely. Reissuing an invite to Auth0 does not issue the link to the users emai.
Question is, am I not following a simple step in the creation on my team members? This does not appear to be an issue with historical clients who were setup, however this may be impacting new clients who have registered since the commencement of 2026.
Thanks
Douglas Clements