checkpoint_cpu_time

Event log.  This never stops but only on one computer.  MYCROFT iMac I5 running Big Sur 11.3.1 but has been doing this for some time before the 11.3.   Is this some problem or have I selected a wrong option someplace?

Sat May  8 07:27:18 2021 | Einstein@Home | [app_msg_receive] got msg from slot 4: <current_cpu_time>4.524336e+03</current_cpu_time><checkpoint_cpu_time>4.494276e+03</checkpoint_cpu_time><fraction_done>4.753649e-01</fraction_done>
Sat May  8 07:27:19 2021 | Einstein@Home | [app_msg_receive] got msg from slot 0: <current_cpu_time>4.791145e+03</current_cpu_time><checkpoint_cpu_time>4.746921e+03</checkpoint_cpu_time><fraction_done>5.062879e-01</fraction_done>
Sat May  8 07:27:19 2021 | Einstein@Home | [app_msg_receive] got msg from slot 3: <current_cpu_time>4.032760e+03</current_cpu_time><checkpoint_cpu_time>3.999784e+03</checkpoint_cpu_time><fraction_done>4.165506e-01</fraction_done>
Sat May  8 07:27:20 2021 | Einstein@Home | [app_msg_receive] got msg from slot 0: <current_cpu_time>4.791970e+03</current_cpu_time><checkpoint_cpu_time>4.746921e+03</checkpoint_cpu_time><fraction_done>5.064900e-01</fraction_done>
Sat May  8 07:27:20 2021 | Einstein@Home | [app_msg_receive] got msg from slot 4: <current_cpu_time>4.525338e+03</current_cpu_time><checkpoint_cpu_time>4.494276e+03</checkpoint_cpu_time><fraction_done>4.755670e-01</fraction_done>
Sat May  8 07:27:20 2021 | Einstein@Home | [app_msg_receive] got msg from slot 3: <current_cpu_time>4.033756e+03</current_cpu_time><checkpoint_cpu_time>3.999784e+03</checkpoint_cpu_time><fraction_done>4.167528e-01</fraction_done>