It isn't a bug. You can't add notes to your log unless you are logging.

Why exactly are you wanting to review notes you have added to your log while you are still flying? I get the feeling you might be trying to repla‌‌ce the scratchpad with our new add-note-to-log feature, which is really design for logging things like "engine made a funny noise", "flew over an interesting house", "saw a spitfire" so you can review them later with the position and altitude you were at.

You can only write a note in a log when you are actually logging. So if you're half way into a flight, you will be logging, and you can log any notes you want.

The notes associated with a flight are part of the record of what happened during the flight, and they're not designed such that you can go back and edit them.‌‌ The debriefing pack is exactly where you go to view lots of things associated with the log including notes; I'm not sure why we would duplicate them elsewhere.

Can't find anything in the user manual, however I just realised something else.
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‌SD automatically starts logging (which is a good thing), but to input a user note, you must first select "Log Engine On" or "Log Off Blocks" before the "Write note" option is available in the menu.
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‌What happens when you forget to select either "Log Engine On" or "Log Off Blocks" and you are half way into a flight and you want to write a note? The user manual says "Log Engine On" or "Log Off Blocks" overrides the log times in the Debriefing Pack.
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‌The "Write note" option needs display in the menu immediately after pressing "Go Flying/Fly"?

Other than in the Debriefing Pack, how do we view notes that we've logged? Reason being, on a busy flight, I might need to go back and check what I've logged.
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‌Is it possible to edit or delete a logged note? In case of typos or errors?