Why does my xbee module receive strange data?

XBee & XBee Gateway XBee - DigiMesh
1

Sorry, I am not good at English.
I’m using 1 thousand xbee modules in tunnel for LED dimming through 1:N(request-response) & broadcasting communication.
Recently, main module received a lot of strange data.

For example,
{{{{kmÿ« (7B 7B 7B 7B 6B 6D FF AB)
{{{{kmÿ«{{{{km«{{{ «ý{{{{‘©‘™{{{«ðý«kmÿ{{{{«kmÿ€B«ð{{{kmÿ«{{{{km« (7B 7B 7B 7B 6B 6D FF AB 7B 7B 7B 7B 6B 6D 7F AB 7B 7B 7B 20 AB FD 7B 7B 7B 7B 91 A9 91 99 7B 7B 7B AB F0 FD AB 6B 6D FF 7B 7B 7B 7B AB 6B 6D FF 01 80 01 42 AB F0 7B 7B 7B 6B 6D FF AB 7B 7B 7B 7B 6B 6D 7F AB)
3333ý{{{{ý (33 33 33 33 FD 7B 7B 7B 7B FD)

Please, why does my xbee module receive strange data?
Thank you for your advice.

logs here.
09-16-2017 15:43:43.668,-,API,“01-9999,0013A2004151D339,DigiMesh 2.4 TH,9000,COM23 - 9600/8/N/1/N,3”

09-16-2017 15:40:53.034,0,RECV,7E000D900013A2004106AA3BFFFEC2AB24
09-16-2017 15:40:53.784,1,RECV,7E0014900013A200415586D5FFFEC27B7B7B7B6B6DFFAB9C
09-16-2017 15:40:55.044,2,RECV,7E0051900013A200415586D5FFFEC27B7B7B7B6B6DFFAB7B7B7B7B6B6D7FAB7B7B7B20ABFD7B7B7B7B91A991997B7B7BABF0FDAB6B6DFF7B7B7B7BAB6B6DFF01800142ABF07B7B7B6B6DFFAB7B7B7B7B6B6D7FABEC
09-16-2017 15:40:55.194,3,RECV,7E000D900013A2004167DA08FFFEC2FD74
09-16-2017 15:40:56.134,4,RECV,7E0016900013A2004106AA38FFFEC233333333FD7B7B7B7BFD20
09-16-2017 15:40:56.784,5,RECV,7E0017900013A2004151D32EFFFEC230312D303031345341360D3E
09-16-2017 15:40:58.544,6,RECV,7E002A900013A200415586D5FFFEC27B7B7B7B018001427B7B7B7BAB91A991997B7B7B7B018001427B7B7B7BAB18
09-16-2017 15:40:58.834,7,RECV,7E0017900013A2004151D32EFFFEC230312D303031355341370D3C
09-16-2017 15:41:00.254,8,RECV,7E0018900013A200415586D5FFFEC27B7B7B7B333333337B7B7B7B66
09-16-2017 15:41:00.394,9,RECV,7E000D900013A2004106AA3BFFFEC2AB24
09-16-2017 15:41:00.794,10,RECV,7E0017900013A2004151D32EFFFEC230312D303031355341370D3C
09-16-2017 15:41:01.184,11,RECV,7E0010900013A200415586D5FFFEC27B7B7B7B1E
09-16-2017 15:41:01.194,12,RECV,7E000D900013A2004106AAE9FFFEC2AB76
09-16-2017 15:41:01.734,13,RECV,7E001D900013A2004106AA68FFFEC291A991997B7B7B7B018001427B7B7B7BABF7
09-16-2017 15:41:02.284,14,RECV,7E000D900013A2004167DA08FFFEC2FD74
09-16-2017 15:41:05.534,15,RECV,7E0014900013A2004106AA68FFFEC2FFAB7B7B7B7BABABB6
09-16-2017 15:41:06.784,16,RECV,7E0017900013A2004151D32EFFFEC230312D303031365341380D3A
09-16-2017 15:41:07.004,17,RECV,7E0027900013A2004106AA38FFFEC27BABAB7B333333337B7B7B7B6B6DFFAB7B7B7B7BABAB91A991997B2B
09-16-2017 15:41:09.627,18,RECV,7E000D900013A2004167DA08FFFEC2FD74
09-16-2017 15:41:10.377,19,RECV,7E0010900013A200415586D5FFFEC27B7B7B7B1E
09-16-2017 15:41:10.827,20,RECV,7E001A900013A2004151D32EFFFEC230322D303030304C30353033300DC8
09-16-2017 15:41:10.977,21,RECV,7E000D900013A2004106AA3BFFFEC2AB24
09-16-2017 15:41:12.077,22,RECV,7E000D900013A20041558703FFFEC2F0EB
09-16-2017 15:41:12.227,23,RECV,7E001A900013A20041558711FFFEC201800142AB7B7B7B7B6B6DFFABAB45
09-16-2017 15:41:12.447,24,RECV,7E001F900013A200415586D5FFFEC27B7B7B7BAB01800142AB7B7B7B7B6B6DFFABABEB
09-16-2017 15:41:14.277,25,RECV,7E0055900013A2004106AA38FFFEC2333333337B7B91A991996B6DFFAB7B7B7B7B6B6DFFABAB01800142AB7B7B7B7B6B6DFFABAB7B7B7B7BAB01800142AB7B7B7B7B6B6DFFABABFD7B7B7B7B7B7B6B6DFFABAB01800142ABEF
09-16-2017 15:41:14.787,26,RECV,7E001A900013A2004151D32EFFFEC230342D303030304C30353033320DC4
09-16-2017 15:41:15.477,27,RECV,7E000D900013A2004106AAE9FFFEC2AB76

2

Looks like you have one or two modules that have something connected to them that is sending undesired data. Check the module with the MAC address of 0013A200415586D5 and 0013A2004106AA3B