Unexpected I/O log

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping 2022-03-07 09:36:53.274 ***
=CRASH REPORT==== 7-Mar-2022::09:36:53.274012 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.23823.1>
    registered_name: []
    exception exit: {#Ref<0.3265887635.1268252673.79943>,3036727,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 397)
    ancestors: [<0.23816.1>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 17731
    stack_size: 28
    reductions: 5616
  neighbours:

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping 2022-03-07 09:36:53.274 ***
=CRASH REPORT==== 7-Mar-2022::09:36:53.274056 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.23830.1>
    registered_name: []
    exception exit: {#Ref<0.3265887635.1268252673.79943>,3036727,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 397)
    ancestors: [<0.23816.1>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 376
    stack_size: 28
    reductions: 239
  neighbours:

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping_kill 2022-03-07 09:37:09.644 ***
=CRASH REPORT==== 7-Mar-2022::09:37:09.643771 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.23946.1>
    registered_name: []
    exception exit: {#Ref<0.3265887635.1267728387.200840>,3028857,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 397)
    ancestors: [<0.23939.1>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 6772
    stack_size: 28
    reductions: 5582
  neighbours:

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping_kill 2022-03-07 09:37:09.644 ***
=CRASH REPORT==== 7-Mar-2022::09:37:09.643774 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.23953.1>
    registered_name: []
    exception exit: {#Ref<0.3265887635.1267728387.200840>,3028857,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 397)
    ancestors: [<0.23939.1>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 376
    stack_size: 28
    reductions: 239
  neighbours: