Missing .h files in assistant editor with xcode (.h files are shown but can't sync)

Hi Xamarin Team,

First of all I know that in some cases .h files in Xcode are not shown because the indexing isn't done correctly or the project hasn't load all the files. This is not the case, after the update to iOS 11 and xcode 9 .h files are shown in my project(opened in xcode) but they are not able to synch with their Xib file, no assistant results are shown, and If I select the .h file corresponding to the xib manually I can't add any outlet either. Rest of my team is having the same problem. Meanwhile I'm using visual studio editor to create/Edit the UI. Any info about this issue?

Thanks a lot,
Isaac