In the last few days I’ve noticed some missing – or possibly mis-synced – items.
While it’s possible this is due to my own careless clicks or keystrokes, it’s happened twice now in as many days – compared to zero times in the preceding 6 years of using Legend, so I’m thinking this isn’t me.

The first time was yesterday: I had a 2nd-level branch that was named using (only) a OneNote link (this is an “attachment”). I renamed the section in Onenote, copied the new link, pasted it at the end of the existing Branch name, Then backspace-d to delete the old link. If you’ve never tried operations like this around ‘attachments’, then I’ll just point out: it can be tricky. The ‘attachment’ behaves sort of like text but the enclosing markdown it is also sorta-involved, so you can end up with unexpected cursor movements, deleting more than you meant, etc. But this isn’t my first rodeo and everything looked fine. Later that evening I returned to that section of my outline to find the entire branch I had previously renamed was now completely gone. Now: maybe I pressed ‘delete’ just one time too many and blew away the whole branch – but where was my “delete multiple items” Toast if that was the case? I dismissed this as my mistake and restored the branch from backup, renamed it again (same way), and had no further trouble.
Now today: I went to a small Project I know I had fleshed out last week, with several Tasks and a number of subtasks (numlisted). When I got to it, I found just two Tasks, both being old versions I had sketched in as placeholders weeks ago. None of the numlist items were to be found. I did several global searches on keywords I remembered, and of course opened it in a popup with no filters – didn’t find anything.

Both these examples happened in outline regions I’ve been working in recently, so I actually noticed them. Neither of them are crushing losses. But it’s scary to consider where else this may have happened – and I’ll simply never know – that is, not until I miss a payment or appointment, or omit an important detail I was counting on having logged.

I can’t help but wonder if this is related to mobile: I saw the recent mobile update, so in a fit of hopefulness I reinstalled the mobile app on my ipad and iphone a few days ago. Things seemed to be working okay; I was able to check my tasklist while out-and-about (I had missed that). But after this, I’ll be deleting those apps again.

@Jay, I’m not sure what useful details I can provide you, but if you DM me I can point you to the problematic items in my outline.

Windows 11 desktop app, stable.
iOS 17.0.2 - iPhone 13 mini
PadOS 17.0.1 - iPad 7th gen