Paper Form Barcode decode error with UTF8 Chinese

I have a Paper Form Barcode

Symbology: QR Code

Scaning Method: Custom

Error correction level: M

Modul width:0.592 mm

Character Encoding: UTF-8

But sometime QR code decode data not equal original data

Case 1:

PaperFormsBarcode1.rawValue = "哈哈";

After decode: I got "哈哈"  ==> OK

Case 2:

PaperFormsBarcode1.rawValue = "哈|哈哈|"

After decoe: I got "蜩�蜩亥嶋|"  ==> Error!!!

Case 3:

PaperFormsBarcode1.rawValue = "A|哈哈|"

After decode: I got "A|哈哈|"  ==> OK

Decoder:

I tried several Android / iOS APP on several cellphones, and they ALL got same result.

Our client (Bank) bought Adobe Livecycle ES4 Soluction, and we need your help very much, thank you!