MSP430G2553 Point type variable runing issue in diffrence chip

Hi,

I met a critical issue of MSP430G2553, the detail as below, any body can help me to analyse it? thanks very much..

Processor：MSP430G2553

Compiler：IAR Assembler for MSP430  5.30.1 (5.30.1.50284)

Iusse describe：

           the issue is I used a point type variable in function to transmit parameter, the same code runing into two difference chips，the one is runing normal, but another is not well.  

         picture1's result is I debug on fault board, according to result I can't find out any error. but the datas are wrong when I via UART print out them as picture2. we deep find these datas in memory address ox34c(as picture 3), the correct address is 0x24c(as picture 4)

picture 1：（fault board）debug，buf point address and data are all correct

Picture2：but the datas are wrong of UART print out.

Picture3

Picture4

Picture5：（fault board）Via temp variable to read out the data and address of buf, the buf address and data are correct (but the real value is wrong via UART print out ) (data in Picture 5  and address in picture6)。

Picture6