Will not allow me to select Merlantis on the home screen and no it’s not my controller . Please exterminate this bug, on PS4
You can report support issues using the support website. Here is a link: Support
Or You can post a message in the Know issues thread. Known Issues
It’s like that on XBO as well, you can select it, it’s just really awkward and takes ages to press the right angle from the right other kingdom.
We’re aware of the issue and are currently working on a fix.
Remember you can also for the meantime, go to hero > any blue or green traitstone then select merlantis and boom it’s selected 
This should be fixed now. Please let us know if you’re still experiencing problems after restarting the game.