Senior Manager, Worldwide DevTech, Kean Walmsley, provided me with an update for the Clipboard Manager for AutoCAD ADN plugin. In direct response to your feedback at labs.plugins@autodesk.com, Kean noted:

"The code wasn’t distinguishing between the clipboard formats for a full AutoCAD object and a partial MText object (and there clearly is a difference in the way they need to be treated). The new version now handles this correctly by filtering out partial MText. The code change stops the plugin from attempting to intercept partial MText copy/paste operations (which can cause a crash), letting AutoCAD handle the operations properly."