Same problem here:
PC1 syncs with Onedrive
Android syncs with Onedrive
PC2 (laptop) = error = "No data found in Onedrive" at start --> Seems to sync ok --> Changes made from PC1 and synced with Android doesnt appear on PC2
Solution: PC2 delete all data and settings -> Restore backup from file stored on PC1 -> Resync with Onedrive correct -> Tests with new elements created on PC1 and on Android and appears on PC2 correctly.
I think the problem may have been in an incorrect or unfinished PC2 sync with Onedrive, which caused consistency failures with subsequent PC1 syncs. PC1 is on almost 24/7 and PC2 runs occasionally.