Created attachment 19352 [details]
Toolbar not shown for initial Detail page in MasterDetailPage. After changing Detail page toolbar works fine.
Issue appeared in 188.8.131.52-pre1, 184.108.40.206 works as expected.
Steps to reproduce:
1. run sample in attachement -> no toolbar visible
2. press "Button" to change Detail page -> toolbar appears
See PR: https://github.com/xamarin/Xamarin.Forms/pull/744
Should be fixed in 2.3.4-pre3. Thank you!
I don't see PR 744 merged in 2.3.4-pre3. Just updated sample to 2.3.4-pre3, it's still broken.
Looks like you've uploaded something wrong to Nuget, because https://bugzilla.xamarin.com/show_bug.cgi?id=51642 is broken too.
Sorry should be on 2.3.4-pre4