When I paste a couple of cells from a Google spreadshhet I get - beside the copied content - also a string of code (I presume, as writing code is Greek to me). This must have come with the las version, because it was not there before.
For example:
Smlednik, parkirišče, 46.1651132,14.4375711, 415 Stari grad, 517; Rakov hrib, 512; Hraški hrib, 455; Tršanca, 440 2:12:00 1:49:00 6,77 298
(copied from a Google spreadsheet) looks like this in Diarium:
<!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}-->Smlednik, parkirišče, 46.1651132,14.4375711, 415Stari grad, 517; Rakov hrib, 512; Hraški hrib, 455; Tršanca, 4402:12:001:49:006,77298
Diarium version: 2.9.39.0
OS : Windows 10 Pro, version: 21H2