I'm running Publisher 2.1.0.1706 on Windows 11 Pro.
When you pin a text frame to a word in another text frame, you cannot unpin the second frame, and you cannot move the pin location. It is easy to reproduce: Create a new document, insert text frame and add some text, create a second frame and pin it to a word in the first frame. You now cannot move or remove the pin. I've tried with the "Float with text" toolbar button, and with the Pinning window. I have a document where I have pinned a multi-column text frame, and every time I click the Unpin button in the Pinning window, the font size of the pinned frame increase, as do the column insets and gutter size, but I could not reproduce that behavior in a simple example.
This bug is not present in 2.04.