LowerCase instead of Uppercase, Digits instead of Numbers

Hello,

we have Handheld Scanners (with Windows CE 6) which using a Client-Programm on a Windows 2016 RDP Server. The Scanners are scanning EAN128 Barcodes.

Since last week we have a strange issue starting in the middle of the day without installing any update or restarting the RDP Server. Instead of UpperCase chars it is scanning Lowercase (aaa instead of AAA) and instead of Special characters it is printing digits ($$$ is noe 444). It Looks like CAPS Lock is active but funny enough a lower char is still lowercase and a Digit is still a Digit.

If i scan directly into Notepad on the scanner i get for example $$$52PalNr$%&127 (this is the intended string i created) and if i scan into Notepad as remoteApp on the scanner i get 44452palnr457127

Anybody an idea what is messed up in the RDP Session?

Thank you,

Thomas