Unexpected I/O log

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping 2024-04-23 09:08:06.451 ***
=CRASH REPORT==== 23-Apr-2024::09:08:06.450818 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.3844.2>
    registered_name: []
    exception exit: {#Ref<0.1453682305.1750597633.119940>,5041803,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 580)
    ancestors: [<0.3839.2>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 6772
    stack_size: 28
    reductions: 5366
  neighbours:

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping 2024-04-23 09:08:06.451 ***
=CRASH REPORT==== 23-Apr-2024::09:08:06.450855 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.3852.2>
    registered_name: []
    exception exit: {#Ref<0.1453682305.1750597633.119940>,5041803,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 580)
    ancestors: [<0.3839.2>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 233
    stack_size: 28
    reductions: 210
  neighbours:

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping_kill 2024-04-23 09:08:31.943 ***
=CRASH REPORT==== 23-Apr-2024::09:08:31.943336 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.3945.2>
    registered_name: []
    exception exit: {#Ref<0.1453682305.1750597633.123399>,5045830,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 580)
    ancestors: [<0.3940.2>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 10958
    stack_size: 28
    reductions: 4599
  neighbours:

*** System report during mod_ping_SUITE:server_ping_pong/1 in server_ping_kill 2024-04-23 09:08:31.944 ***
=CRASH REPORT==== 23-Apr-2024::09:08:31.943379 ===
  crasher:
    initial call: gen_event:init_it/6
    pid: <0.3952.2>
    registered_name: []
    exception exit: {#Ref<0.1453682305.1750597633.123399>,5045830,ok,
                     [{mod_ping_SUITE,server_ping_pong}],
                     []}
      in function  gen_event:terminate_server/4 (gen_event.erl, line 580)
    ancestors: [<0.3940.2>]
    message_queue_len: 0
    messages: []
    links: []
    dictionary: []
    trap_exit: true
    status: running
    heap_size: 233
    stack_size: 28
    reductions: 210
  neighbours: