Bug 54649 - Navigation page title bar disappears upon navigating through tabs in (UWP)
Summary: Navigation page title bar disappears upon navigating through tabs in (UWP)
Alias: None
Product: Forms
Classification: Xamarin
Component: Windows ()
Version: 2.3.4
Hardware: PC Windows
: --- critical
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2017-04-06 15:10 UTC by Daryl
Modified: 2017-05-05 11:54 UTC (History)
6 users (show)

Tags: uwp, tabbedpage, navigationpage, navbar ac
Is this bug a regression?: ---
Last known good build:

repro project (293.49 KB, application/x-zip-compressed)
2017-04-06 21:18 UTC, Jimmy [MSFT]

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Description Daryl 2017-04-06 15:10:56 UTC
# Steps to reproduce

Make a tabbed page with (x) amount of tabs in. 
Each tabbed call calls a page of its own, with a navigation page wrapped around it
One of those pages has a webview inside it with some html content

# Expected behavior
The nav/title bar should be present when all pages are selected, and all contents should render as expected 

# Actual behavior
Click through each of the tabs, upon revisiting one of the tabs previously clicked, the title/nav bar disappears as though you are not in a navigation page, and the webview does not render the content when revisited

# Supplemental info (logs, images, videos)
This has been logged in bugzilla before I think, but was resolved/fixed. I can't seem to find it at the moment but it is also described here:

# Test environment (full version information)
Visual studio 2015 community
Xamarin forms v2.3.4.224
Comment 1 Jimmy [MSFT] 2017-04-06 21:18:08 UTC
Created attachment 21282 [details]
repro project

I believe I'm able to reproduce this issue. I am attaching a repro project to the report.

### Steps to Reproduce
1. Run the attached UWP project
2. Go through each tab to get to Tab 4
3. Go back to Tab 3 or another tab

### Expected Results
The Page title will be visible in the nav bar.

### Actual Results
The page titles for the previous tabs are not visible anymore.

### Version Test    BAD   BAD   BAD
Comment 2 Daryl 2017-04-07 09:18:41 UTC
Thanks for this - I didn't end up having time at the end of the day to do this, so you've saved me the trouble. 

NB - the point I made about the webview is a red herring and a separate issue of my own, so please ignore. The title bar issue is the sole problem here.
Comment 3 Samantha Houts [MSFT] 2017-05-04 18:23:35 UTC
Comment 4 Rui Marinho 2017-05-05 11:54:39 UTC
Should be fixed on 2.3.6-pre1