Calling back into the default expression evaluator doesn't work with arrays

This may be an issue with my implementation, but I've noticed that when I try to create a visualizer that just kicks the work back to the default expression evaluator I get different results than when I have no visualizer at all. In particular, I start to see ??? in the display string for array elements in the Watch window.

In this screenshot the NoVis type has no custom visualizer at all. Notice that it shows the value of the single array element in the display string. The DefaultVis type has a custom visualizer but all it does is callback into EvaluateExpressionCallback from EvaluateVisualizedExpression and set pUseDefaultEvaluationBehavior to true in UseDefaultEvaluationBehavior.

I'm using VS2022 (17.0.4) here.

In VS2019 (16.11.8) I get slightly different results. I can run the same solution (after downgrading the Microsoft.VSSDK.BuildTools package and build tools version) and it works correctly. However, it will exhibit the same issue if I set pUseDefaultEvaluationBehavior to false and then use the callbacks to do default visualization in the rest of the IDkmCustomVisualizer functions.

vs-native-debug-visualizer-github.zip

Start with the attached vs-native-debug-visualizer-github.zip sample and trace EvaluateVisualizedExpression, EvaluateExpressionCallback, and UseDefaultEvaluationBehavior. Compare the callback behavior in VS2022 17.0.4 with VS2019 16.11.8, focusing on array elements in the Watch window. Done means delegating to default evaluation no longer displays ??? for array elements.