Strange symbols in my symbol/ticker cells in my portfolio spreadsheet

I have a stock portfolio and when I opened the excel sheet today I could see that where I had added my stock ticker/symbols I use to add the ticker symbol for the company whit the new stock icon in the excel ribbon. This is a new feature in office 365. But now in my ticker/symbol cells it has been added some symbols that might look like chine text but I do not now. I have gone true everything in excel but cannot find anything. It can be a bug in the stock icon app in excel but I do not now. I send you 3 screenshoots so you can se. It's in Norwegian but I think you will understand. The cells that have the ticker/symbols for stocks are connected to the internet so it is a database somewhere. Hope you can help me and if you need more send me a message.
strange-charackters.pngticker-symbols-strange-symbols.pngExcel-strange-symbols.pnguse-this-icon.png

I hope this pictures are Ok to solve the problem. I have never seen something like this before. The only text that are going to be in the ticker cells are everything without the strange characters.

Probably results from an Asian source,