Outlook calendar encoding troubles

Hello, writing to you in times of great need

In my organization, users use zoom meetings by creating them via browser. They copy the meeting parameters to a recurring meeting in outlook. And they send this meeting to several people. All good so far

But sometimes they decide to add something (text, files) to a meeting instance. Send a meeting update to all participants. And then boom! When a meeting participant opens the modified meeting in the calendar, he sees it with a corrupted encoding. Everything is ok with meeting update in inbox, problem with calendar.

Here is an example of corrupted text:

С уважением,

of course I can convert this text into readable, but this will not eliminate the problem, but only the consequences

thanks!