Our users are complaining the slowness and speed when working in Zoho Office. Explicitly when working in a sheet. Here are observed issues
*Copy and pasting values from one cell into another takes 10-20 seconds to show it has done it.
*Modifying a value where a cell is calculdated as part of a forumula and the cell that shows the results of that are all delayed, or it fails completely
*Previously inputted cells with values will later show to have that data missing.

This is replicated from our end when we tested it against customer reported issues.  These issues are replicated using multiple browsers, different ISPs, and geo locations.