No comments/footnotes in copyholder (Beta 35)

I can’t seem to add or view comments or footnotes in a document opened in a copyholder. The comments pane background says “No Text Loaded.” Mouseover works fine, and the comments and footnotes pane works fine in a regular window.

Are there any other window settings I should be aware of, like split view or a locked inspector state? In a simple one editor + copyholder scenario I’m not running into difficulties with this.

I haven’t noticed this problem yet since installing Beta 36. My setup was vertical split with one copyholder. I don’t remember whether the split side with the copyholder was locked. It might have been.