Xbee XCTU Software freezing

So when i use the Xctu to send data from one of my Xbees 1 to the other Xbee 2.. The data sends the first 10 times.. after that, the XCTU software and serial monitor freezes.. It still lets me send data but it does not update it's real time log. So i usually would restart it at this point..

The only reason i know that when it freezes it still sends data is because, i have the second Xbee 2 connected to an arduino and have an SD logger connected to that arduino, so it logs whenever it receives data from Xbee 1.

What could be the cause of the freezing?