This is with Logos 26.0.0 (build 13) on iPad
I have “swipe to highlight“ enabled and when I swipe over a portion of text in a non-downloaded resource, the portion of text turns green (my default highlighting colour) until I remove the finger that was scrolling.
At this point the highlight disappears from the resource even though it is present in the Notes Tool.
If I swipe the same portion of text again, the highlight appears but this results in a duplicated note.
When the resource is downloaded, the highlight appears correctly after swiping once.