I have trouble decoding the QR code from this PDF (on page 27).
It seems the Umlaut in the last line is not decoded correctly. Screenshot from the live demo:

The last line should read ..."für Gartenarbeit und Entsorgung"...

I can decode the QR Code just fine in Java using ZXing.
If I set the the CHARACTER_SET decoding hint to "ISO-8859-1" the decoded result is exactly the same as pictured in the screenshot, so I suspect that somewhere ISO-8859-1 is assumed in InstaScan.

Here's the QR Code I used for easier copy/pasting:

Is there a way to specify the encoding to use, or is this a bug?