I am experiencing the same issue as listed in the conversation https://discussions.agilebits.com/discussion/30644/right-click-to-share-sends-unexpected-item.
Example of issue:
Say you have two items. If you have #1 selected, then you right-click #2 and select share, it will actually share #1. The only way to share #1 is by first selecting it with a standard click, then you can right-click it and share. The right-click menu seems to only share what was previously selected, as opposed to the entry that is being right-clicked.
Hopefully the point comes across, I have a video of the issue if needed, but it doesn't seem like I can upload it to the forum post.
1Password Version: 6.8.6 (686003)
Extension Version: Not Provided
OS Version: macOS 10.12.6
Sync Type: iCloud