I took the following steps:
1. My NASB95 is open to Romans 15:7

2. I opened the side panel, selected the Notes and Highlights display, selected Type: Highlights, then Bible Book: Romans to see my Romans highlights.

3. I then cleared the both the Bible Book: Romans and the Type: Highlights filters

I was surprised not to see the full Bible text reappear (see above). Not only that, but the only way I have found to get it back is to close the Bible and reopen it.
Surely this is not how this is supposed to work, is it?