Unexpected I/O log

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping 2022-03-03 10:33:28.959 ***
=CRASH REPORT==== 3-Mar-2022::10:33:28.959610 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.28464.0>
    registered_name: []
    exception exit: {#Ref<0.879826600.1458831361.55926>,3032421,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 405)
    ancestors: [<0.28457.0>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 10958
    stack_size: 29
    reductions: 3898
  neighbours:

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping 2022-03-03 10:33:28.959 ***
=CRASH REPORT==== 3-Mar-2022::10:33:28.959617 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.28471.0>
    registered_name: []
    exception exit: {#Ref<0.879826600.1458831361.55926>,3032421,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 405)
    ancestors: [<0.28457.0>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 376
    stack_size: 29
    reductions: 213
  neighbours:

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping_kill 2022-03-03 10:33:45.281 ***
=CRASH REPORT==== 3-Mar-2022::10:33:45.281348 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.28587.0>
    registered_name: []
    exception exit: {#Ref<0.879826600.1458831361.61700>,3028075,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 405)
    ancestors: [<0.28580.0>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 10958
    stack_size: 29
    reductions: 4347
  neighbours:

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping_kill 2022-03-03 10:33:45.281 ***
=CRASH REPORT==== 3-Mar-2022::10:33:45.281351 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.28594.0>
    registered_name: []
    exception exit: {#Ref<0.879826600.1458831361.61700>,3028075,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 405)
    ancestors: [<0.28580.0>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 376
    stack_size: 29
    reductions: 213
  neighbours: