How to make 1 Person EIT View Only for a Responsibility

We have a requirement where a particular responsibility can update all Person EITs except for one via the PUI. The remaining EIT should be 'View Only'.  (5 Updateable and 1 View Only)

I have added a forms personalization to the Person EIT and the following happens:

1. All EITs are updateable

2. Select the EIT Type which should be 'View Only'

2. Click in the Details field to open the flexfield for the Person EIT

3. The EIT is 'View Only', however, all of the other 5 EITs switch to 'Read Only' as well. Once I close the form and go back in to the Person EIT, the 5 EITs are updateable again.