Zoho Workdrive Sync Problem

Zoho Workdrive Sync Problem

Hi, 
I am using Zoho Workdrive (and Zoho One) for my whole team, yet I am experiencing some issues in syncing documents. More specifically, the issue revolves around two PCs in my team (both Windows 10); the icon displays a full-working sync, folders are fully synced, but one PC keeps opening an older version of the files, de facto erasing more updated versions. 
I am not talking about mere seconds, we are talking about 1 hour timelapses between different versions. 
Any hints on how to proceed and solve the issue?
Thank you, Antonio