FWIW, I've submitted a ticket to support as below. Fingers crossed it'll get picked up...
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My tasks aren't loading on my desktop Mac app or within the web browser (both Safari, Chrome & Edge have been tried with the same results).
I have tried uninstalling/ reinstalling the application and forced reloads with no changes to the issue. Critically though, I don't believe this issue has anything to do with the app on my Mac as the problem still occurs in multiple browsers.
I can see the tasks on the iOS application (not web) although the when reviewing them within the 'Notes' tab, they don't load and, from the 'Assigned date' section, each one has 'Note unavailable' (images attached).
- Mac App Version 10.80.3
- iOS version 10.81.0