Hi guys, I've recently updated from 3.0.6 -> 3.0.9, and I'm now hitting an error on the following XAML:

<MultiBinding StringFormat=" {0}/{1}">
<Binding Path="SomeArray.Count" Mode="OneWay" />
<Binding Path="SomeOtherArray.Count" Mode="OneWay" />
</MultiBinding>

The issue is the Mode doesn't seem to come through, the error is as follow:

"A TwoWay or OneWayToSource Binding cannot work on a read-only property"

SomeArray and SomeOtherArray are both ObservableCollections.

This exact XAML used to work fine with 3.0.6. I'm guessing #9800 caused this issue.

Cheers,

-Steven