Created attachment 15916 [details]
iOS app to reproduce issue
Attached is a simplified test case that reproduces the issue.
- Compile and run the iOS app
- Touch the first login button
- Touch the second login button
After the blue page appears you will get a NRE.
I found that a null check on the following line avoids the issue, but feel the real fix is more complicated than that.
*** Bug 42214 has been marked as a duplicate of this bug. ***
Should be fixed in 2.3.4-pre1
I have checked this issue with Xamarin.Forms 2.3.4-pre1 and this issue has been fixed.
Hence closing this issue.