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 say speed event time is in below function

static void comb_page0_data_log(ant_bsc_combined_page0_data_t const * p_page_data)

 LOG_COMB_PAGE0("%03us\n\r", (unsigned int)ANT_BSC_EVENT_TIME_MSEC(p_page_data->speed_event_time));