I discovered a workaround using a new feature of Clippings Manager that I totally forgot about. In Clippings 3.0, you can paste a clipping by double-clicking a clipping in Clippings Manager's tree list. Here are the steps:
- Click on the text box where you want to paste a clipping.
- Right-click to invoke the context menu, then choose Clippings → Organize Clippings. This will open Clippings Manager.
- Find the desired clipping in the tree list and double-click on it. The selected clipping will be pasted into the web page text box at the cursor position.