Xamarin.forms: [Bug] CollectionView on android (not test on iOS) lable binding show blank after do some scroll

[jingliancui]

CVSample.zip
run the code on android device or the android emulator.
scroll the collectionview between top and bottom.
then result like these pictures:

[anirugu]

I run the code and finding the same issue, At first I can see the result without any blank but when I scroll to bottom and top, I can see the result as same as given in screenshot.

[samhouts]

closed by #6390

[jingliancui]

@samhouts this bug still not fix in 4.1.0.618606

[samhouts]

@jingliancui Thanks for letting us know! We'll take another look.

[keozx]

This still happens in 4.2.0.709249

[adrianknight89]

@samhouts I noticed this too. I was testing RefreshView. When the collection is refreshed, then some labels are missing on Android.

[adrianknight89]

6988

[hartez]

Note: only happens with the fast label renderer; if I force it to use the legacy renderer, the labels will occasionally start out blank, but then refresh themselves and draw correctly.

It's only happening when the views/renderers being created by the templates are re-used; if I force the CollectionView to recreate the template content every time, the problem goes away (at a huge performance cost).

[007vel]

Still happening in 4.6.0.847. is it fixable or not?