There are identified issues with agent 7.5 & 7.5.1 and persona, could you provide some details on your environment including which release of Windows? e.g Windows 10 1803.
I would recommend to use agent 7.4 or possibly look at 7.6 which was just released, so far I am getting positive results testing 7.6 and persona. Also have a look at Persona - Roaming Profiles
I tried using 7.4 and it didn't fix the problem, so I used 7.3.2 and that "fixed" the problem for the moment.