Can qnx_setclock cause problem.

we have a problem of processes getting reply blocked on 0. when we tried to
locate the problem it was
observed that qnx_setclock is causing the problem. the qnx_setclock is
called every 5 mins to set the qnx clock. we are also setting thr rtc clock
every 5 mins. Is there a possibility that the timers are getting currupted
due to this?