Application crash after language switch in MyChat for Windows client application

We are experiencing random client application crashes after changing application layout language. It occurs particularly when the application is not used for a longer period of time.
View -> Language
After the crash occurs a problem with translation file for polish language (Message858).
Tools -> Message history -> Broadcasts sent
Red arrows are showing english and russians words instead of polish.
After switching to another language and then back to polish everything goes back to normal.
Thanks and regards.
View -> Language
After the crash occurs a problem with translation file for polish language (Message858).
Tools -> Message history -> Broadcasts sent
Red arrows are showing english and russians words instead of polish.
After switching to another language and then back to polish everything goes back to normal.
Thanks and regards.