Could not upgrade RDL on Report xxx, hexadecimal value 0x15, is an invalid character

For a couple of month already we are encountering this error when importing REP207 as .txt :

Could not upgrade RDL on Report 207 Sales - Credit Memo.'', hexadecimal value 0x15, is an invalid character. Line 2878, position 64. The import stopped at line 7235.

We did we do/find out?

1. Searching in REP207 we cannot find this character 0x15
2. Seems to happen only on Windows 10 machines (our developers laptops). Doing this on our servers that run Windows Server 2012 R2 (and also previously on our laptops that ran Windows 8), this issue does not occur
3. No issue when importing REP207 as .fob
4. So our workaround is to create the .fob on our server and than import .fob on our laptop, but this is a nuisance.
5. No problems with any of the other reports

Did any of you encounter this? Solutions? Tips?