[Bug] TabView Tab Indicator width reverts to item width on selected tab change

[shaun-h]

Description

When TabIndicatorWidth is set the indicator does get given the width requested, but when a different tab is selected to the current tab the indicator width gets set the tab item width.

Steps to Reproduce

1. Create a TabView with 2 or more tabs
2. Set the tabview to have a TabIndicatorWidth="10"
3. Run the application and change the selected tab

Expected Behavior

TabIndicator stays the same width as TabIndicatorWidth on selection change

Actual Behavior

TabIndicator width sometimes reverts to tab item width on selection change

Basic Information

• Version with issue: 1.0.2
• Last known good version: N/A
• IDE: Visual Studio for Mac (8.8.9)
• Platform Target Frameworks:
  • iOS: 14.4
  • Android: Not Tested
  • UWP: Not Tested
• Android Support Library Version: Unsure
• Nuget Packages: Unsure
• Affected Devices: I have tested in the iOS simulator and on iPhone 12 Pro

Workaround

No workaround known

Reproduction imagery

https://user-images.githubusercontent.com/1880053/108593441-cd00cd00-73c7-11eb-955e-66f3089fef55.mov

Reproduction Link

TabVIewRepro.zip

[hnabbasi]

I am seeing the same issue in v1.0.3

[Kapusch]

Same in 1.1.0-pre2

[stavroaudi]

Any updates? Still doesn't work on 1.2.0-pre2

[stavroaudi]

I noticed that this is related to another issue. I have a TabView, and 2 TabViewItems, and have set IsSwipeEnabled to False. Inside the first TabViewItem I have a SwipeViewItem where you swipe left to delete an item. On the first try, the swipe to delete works, but if I dimiss it and swipe again to show the delete button, the tab indicator width is reset and it swipes to the second TabViewItem instead of executing the SwipeViewItem to show the delete button.

[khushal247]

I am facing same issue on Android

[stavroaudi]

This needs a fix or at least a workaround