Unexpected I/O log

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping 2022-03-18 10:55:07.924 ***
=CRASH REPORT==== 18-Mar-2022::10:55:07.924428 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.29139.0>
    registered_name: []
    exception exit: {#Ref<0.3071861660.1587806209.224146>,3057451,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 405)
    ancestors: [<0.29125.0>]
    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 2022-03-18 10:55:07.924 ***
=CRASH REPORT==== 18-Mar-2022::10:55:07.924428 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.29132.0>
    registered_name: []
    exception exit: {#Ref<0.3071861660.1587806209.224146>,3057451,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 405)
    ancestors: [<0.29125.0>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 10958
    stack_size: 29
    reductions: 3882
  neighbours:

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping_kill 2022-03-18 10:55:24.276 ***
=CRASH REPORT==== 18-Mar-2022::10:55:24.275967 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.29255.0>
    registered_name: []
    exception exit: {#Ref<0.3071861660.1587806209.226301>,3031476,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 405)
    ancestors: [<0.29248.0>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 10958
    stack_size: 29
    reductions: 4352
  neighbours:

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping_kill 2022-03-18 10:55:24.276 ***
=CRASH REPORT==== 18-Mar-2022::10:55:24.276431 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.29262.0>
    registered_name: []
    exception exit: {#Ref<0.3071861660.1587806209.226301>,3031476,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 405)
    ancestors: [<0.29248.0>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 376
    stack_size: 29
    reductions: 213
  neighbours: