Strange character in text copied from excel

[AndreHaak]

I hope you can help with this problem. I copie a large amount of Tagnumbers from an Excel sheet in a Word table. In Word two extra characters show up. The are not printed and also not visable if I hide lay out. But if I copy the tagnumber from Word and paste it in the search field in the Excel sheet were is was retrieved from, Excel cannot find the number anymore. Please see attached file were I marked the character yellow. The excel sheet is an export from Autocad Plant 3D and the character shows on positions left blank. What is the character and why the content changes when it is copied?