Cyrillic /slavic characters appear as code

Dear Colleagues,

In some of our Smartsheets, gathering input from third-party collaborators, they write their input into Cyrillic. While some text appear fine, a number of entries include the text as well as set of html-like characters.

We did not manage to figure out why and when it happens, and how to prevent that.

I'd appreciate your advice, suggestions.


Best, Dan