Workaround for unlocking locked fields still possible?

[FeG]

Hi there,

I am currently trying to assign a field on a transition screen for a transition to the same condition to lock/unlock specific fields for e.g. Project Managers. I have found some sites explaining that, but it simply does not work, when I set it up as described, I feel like I am doing it wrong, is anyone currently doing this? Is it still possible or was this maybe patched out?

My end goal is a bit different tho. I just wanted to assign this (if it works properly) in a reverse way, like locking everything in every state and unblocking all the required (custom) fields. At this point I think I might be better off with an addon. 

I am speaking of the workaround as described by Joe Pitt here:

• How can we lock jira Custom field
• and also here:

• See an easy solution to protect issue fields with a single workflow transition | by Bogdan Gorka | Medium
• Making Some Fields Editable in a Locked Status in Jira Cloud

I appreciate any help. I feel like I am doing it wrong, so if its still possible, I am certain of that, but otherwise I will have to search for an addon that does this feature.