In the last couple of days, I've had display issues with the navigation pane on my word documents (been using 365 for years and this is the first time this has happened). I'm running Windows 10 Home.
I assume it's come about from the latest update, because my CCleaner tools list shows an install date of 23/5/2025 version number 16.0.18827.20092 (updates happen automatically for me so I tend not to even realise they've happened.)
Basically, the document opens up and runs fine (I always use the navigation pane, so it's always left open to key in search terms) but as soon as I edit the document in any way, and then try to key in the search term again, the navigation pane stays blank and won't show any results be it 'search/pages/headings'. I can click through the up/down arrow buttons to go to the next search result, but I can't jump to a specific result because it doesn't show them.
Left is it initially working; then right is it after making edits to the document then trying to use the search term again:

I tried to see if I could 'repair' 365 from the CCleaner tools list, but there wasn't an active button for it, only a greyed out unclickable repair button.
I'm wondering if this issue is just happening to me or is it a bug from the latest update to be resolved in the next one?
The only thing I haven't tried is uninstalling Microsoft 365 and reinstalling it, but I thought if it was a known issue, and a bug from the latest update, that the issue would still be there when reinstalled.
Posting this here more for reporting, and seeing if others are having this issue too, than anything else.