So do you have this issue with that client?
Yes i have.
I found that HelpMsgStr is called from function getHelpMsg which is defined in Data\luafiles514\lua files\common.lub file. I didn't found any call of this function from any file in Data folder. Probably it's called from exe file. I'll hex it today, will see if i found something new.
getHelpMsg has only one parameter idx, so i think that it should be called in some cycle.