Name plates does not show although the option is on in Island Settings
Teams settings override these, and Class settings override both, check them too.
I dont have that devices in my Island. I just put a Class Designer and plates are not visible yet 
@davidpkami Thank you for your report! Can you please re-post using the “New Issue” option on the Issues and Bug Reporting forums? Posts with this feature are connected directly into our development team so we can quickly get to them!For more information, such as how to get the reference ID, please check out the article here: https://create.fortnite.com/news/using-the-creative-and-uefn-bug-reporting-form
I have this issue too! so annoying