WebDesigner crashes when removing nodes

Currently on 8.1.4 and we've been observing this behavior since v7 days.

Whenever I remove a WebDesigner node (using 'del' key or right-klick menu), and the deletion is or includes a 'Function mapping' node, the WebDesigner crashes with the following error message:
(not sure why I can't paste screen clip)

This operation is invalid for deleted objects.
    at VI.WebDesigner.TypeInfo.ExtensiblePropertyInfo.<GetPropertyWithExtensionAsync>d__38.MoveNext()
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
    --- End of stack trace from previous location where exception was thrown ---
    at VI.WebDesigner.TypeInfo.ExtensiblePropertyInfo.<GetPropertyExtensionInfoAsync>d__39.MoveNext()

We are using a databse project.

Whenever this happens, we need to close WD and re-open it. Sometimes the changes performed up to this point can't be saved. Most of the time, we dont want to save them, just because we need to restart WD. I don't belvieve this to be a product defect over all these years. Are we doing something wrong?

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