ANT BSC Speed event time not change After a period of work although button press or release

[275508995]

nRF51_SDK_10.0.0\examples\ant\ant_plus\ant_bsc\bsc_tx\combined\button\pca10028 

 ANT BSC Speed event time   not change After a period of work  although button press or release 

[275508995]

i use 51422,sdk12.3 have no 51422 project,so i use sdk10