Change in MultiBinding behaviour in 11.1.0-rc1 compared to 11.0.11 about avalonia

[mysticpillow]

A minimum repro: https://github.com/mysticpillow/MultiBindingRegressionRepro
It uses a simple TextBlock instead of TreeDataGrid.
Actually MultiBinding stopped working at 11.1.0-beta1 version.

[timunie]

Please file a minimum sample to reproduce.

[grokys]

Yep, this looks like the same issue as #16137 in that you're raising a PropertyChanged event on a property that hasn't changed, and expecting that to trigger a side-effect. My comment in #16137 (comment) also stands for this issue.

Given that these two issues have the same root cause I'm going to close this issue and track it in #16137.

[mysticpillow]

I think #16137 is closely related to this issue. In my example a MultiBinding converter (which is also custom) is used only once and then ignores following OnPropertyChanged calls in the same way.

[grokys]

Reopening this issue because although it has the same root cause as #16137, the fix for it is more difficult. I don't think a fix for this regression will make it into 11.1.0 as:

• The fix is more involved, and potentially destabilizing
• It's even more of an edge-case than #16137