bug: react, vue back button does not select correct view when going back from a tabs instance

Bug Report

Ionic version:

[ ] 4.x [x] 5.6.3 (Latest)

Current behavior: I have an ionic-vue app that uses vue-router and the tabs template. When I navigate to a nest tabs, and switch to tab2 and switch back to tab1. When I click on ion-back-button it show error Cannot read property ‘ionPageElement’ of undefined

Expected behavior: I would expect that switch back to parent tabs

Steps to reproduce: Make a ionic-vue app using the tabs template Add a sub route to one of the tabs (i.e. tab1) (make sure this view has the ion-back-button active in the ion-toolbar) Enter the sub route (of tab1) Switch to another tab (i.e. tab2) from this sub route Switch back to the tab that has the sub route active (i.e. tab1) Press the back button in this sub route The back button causes the view to return to the parent view of this tab (tab1 in this case, which I would expect) but the url switches back to the other tab (tab2)

• Make a ionic-vue app using the tabs template
• Create tabs2 (/tabs2/test) and add ion-back-button
• Navigate to tabs2/test/tab1
• Switch to tab2
• Switch back to tab1
• Click ion-back-button
• It show error Cannot read property ‘ionPageElement’ of undefined

GIF Image ( Steps to reproduce )

Related code: https://codesandbox.io/s/magical-snow-w7xok

Other information:

Ionic info:

Ionic:

   Ionic CLI       : 6.13.1
   Ionic Framework : @ionic/vue 5.6.3

Capacitor:

   Capacitor CLI   : 2.4.7
   @capacitor/core : 2.4.7

Utility:

   cordova-res : 0.15.3
   native-run  : 1.3.0

System:

   NodeJS : v14.15.5
   npm    : 6.14.11
   OS     : macOS Big Sur

[horganice]

@liamdebeasi Just did a dev build on my project. all is working fine now 😃 Thank you !

[liamdebeasi]

Thanks for the issue. Can you try the following dev build and let me know if it resolves the issue?

npm install @ionic/vue@5.7.0-dev.202104021913.b0533ff @ionic/vue-router@5.7.0-dev.202104021913.b0533ff