ThreadSanitizer: data race lib/isc/unix/time.c:110 in isc_time_isepoch

Job 1742391 on v9_16 failed in the dnssec system test with the following TSAN error:

WARNING: ThreadSanitizer: data race 
  Read of size 4 at 0x000000000001 by thread T1 (mutexes: read M1, write M2):
    #0 isc_time_isepoch lib/isc/unix/time.c:110
    #1 zone_settimer lib/dns/zone.c:14649
    #2 dns_zone_maintenance lib/dns/zone.c:6281
    #3 dns_zonemgr_forcemaint lib/dns/zone.c:18190
    #4 view_loaded server.c:9654
    #5 call_loaddone lib/dns/zt.c:301
    #6 doneloading lib/dns/zt.c:575
    #7 zone_asyncload lib/dns/zone.c:2259
    #8 task_run lib/isc/task.c:845
    #9 isc_task_run lib/isc/task.c:938
    #10 isc__nm_async_task lib/isc/netmgr/netmgr.c:855
    #11 process_netievent lib/isc/netmgr/netmgr.c:934
    #12 process_queue lib/isc/netmgr/netmgr.c:1003
    #13 process_all_queues lib/isc/netmgr/netmgr.c:775
    #14 async_cb lib/isc/netmgr/netmgr.c:804
    #15 <null> <null>
    #16 isc__trampoline_run lib/isc/trampoline.c:191
    #17 <null> <null>

  Previous write of size 4 at 0x000000000001 by thread T2:
    #0 isc_time_set lib/isc/unix/time.c:93
    #1 set_key_expiry_warning lib/dns/zone.c:6430
    #2 del_sigs lib/dns/zone.c:6711
    #3 zone_resigninc lib/dns/zone.c:7113
    #4 zone_maintenance lib/dns/zone.c:11111
    #5 zone_timer lib/dns/zone.c:14588
    #6 task_run lib/isc/task.c:845
    #7 isc_task_run lib/isc/task.c:938
    #8 isc__nm_async_task lib/isc/netmgr/netmgr.c:855
    #9 process_netievent lib/isc/netmgr/netmgr.c:934
    #10 process_queue lib/isc/netmgr/netmgr.c:1003
    #11 process_all_queues lib/isc/netmgr/netmgr.c:775
    #12 async_cb lib/isc/netmgr/netmgr.c:804
    #13 <null> <null>
    #14 isc__trampoline_run lib/isc/trampoline.c:191
    #15 <null> <null>

  Location is heap block of size 2801 at 0x000000000023 allocated by thread T3:
    #0 malloc <null>
    #1 default_memalloc lib/isc/mem.c:717
    #2 mem_get lib/isc/mem.c:626
    #3 mem_allocateunlocked lib/isc/mem.c:1292
    #4 isc___mem_allocate lib/isc/mem.c:1312
    #5 isc__mem_allocate lib/isc/mem.c:2563
    #6 isc___mem_get lib/isc/mem.c:1061
    #7 isc__mem_get lib/isc/mem.c:2542
    #8 dns_zone_create lib/dns/zone.c:1047
    #9 dns_zonemgr_createzone lib/dns/zone.c:18063
    #10 configure_zone server.c:6451
    #11 configure_view server.c:4024
    #12 load_configuration server.c:9096
    #13 run_server server.c:9815
    #14 task_run lib/isc/task.c:845
    #15 isc_task_run lib/isc/task.c:938
    #16 isc__nm_async_task lib/isc/netmgr/netmgr.c:855
    #17 process_netievent lib/isc/netmgr/netmgr.c:934
    #18 process_queue lib/isc/netmgr/netmgr.c:1003
    #19 process_all_queues lib/isc/netmgr/netmgr.c:775
    #20 async_cb lib/isc/netmgr/netmgr.c:804
    #21 <null> <null>
    #22 isc__trampoline_run lib/isc/trampoline.c:191
    #23 <null> <null>

  Mutex M1 is already destroyed.

  Mutex M2 is already destroyed.

  Thread T3 (running) created by main thread at:
    #0 pthread_create <null>
    #1 isc_thread_create lib/isc/pthreads/thread.c:79
    #2 isc__netmgr_create lib/isc/netmgr/netmgr.c:350
    #3 isc_managers_create lib/isc/managers.c:33
    #4 create_managers main.c:920
    #5 setup main.c:1245
    #6 main main.c:1548

  Thread T2 (running) created by main thread at:
    #0 pthread_create <null>
    #1 isc_thread_create lib/isc/pthreads/thread.c:79
    #2 isc__netmgr_create lib/isc/netmgr/netmgr.c:350
    #3 isc_managers_create lib/isc/managers.c:33
    #4 create_managers main.c:920
    #5 setup main.c:1245
    #6 main main.c:1548

  Thread T3 (running) created by main thread at:
    #0 pthread_create <null>
    #1 isc_thread_create lib/isc/pthreads/thread.c:79
    #2 isc__netmgr_create lib/isc/netmgr/netmgr.c:350
    #3 isc_managers_create lib/isc/managers.c:33
    #4 create_managers main.c:920
    #5 setup main.c:1245
    #6 main main.c:1548

SUMMARY: ThreadSanitizer: data race lib/isc/unix/time.c:110 in isc_time_isepoch

Similar TSAN error in the same CI job: d84c7cc0b14ccdcf28a2c70083942efdc1f99addab62b39f3ab8f81f1e507975.tsan