When the Model is wrapped in a QSortFilterProxyModel, repeatedly calling "invalidate" causes a crash.

[mokugyos]

Does QMLTreeView not support QSortFilterProxyModel for filtering, such as search or checkbox filtering functions?

[Daguerreo]

Never tried so I can't tell it's supported. You could try opening a PR with an example using the proxy model, maybe I can try taking a look at it.