It happened again, now I remembered the timestamp and found these entries in the bugreport:
DUMP OF SERVICE dropbox:
Service host process PID: 2566
Threads in use: 0/32
Client PIDs: 4164, 774
Unknown argument: -a
Drop box contents: 68 entries
Max entries: 1000
Low priority rate limit period: 2000 ms
Low priority tags: {data_app_wtf, keymaster, system_server_wtf, system_app_strictmode, system_app_wtf, system_server_strictmode, data_app_strictmode, netstats}
2026-02-10 08:27:52 SYSTEM_BOOT (text, 479 bytes)
2026-02-10 08:28:02 data_app_crash (text, 2679 bytes)
2026-02-10 09:03:15 data_app_anr (compressed text, 22307 bytes)
2026-02-10 09:21:55 system_server_pre_watchdog (compressed text, 18496 bytes)
2026-02-10 09:22:49 system_server_watchdog (compressed text, 18501 bytes)
2026-02-10 09:23:07 data_app_crash (text, 2681 bytes)
2026-02-10 09:23:09 SYSTEM_RESTART (text, 536 bytes)
2026-02-10 09:30:24 data_app_anr (compressed text, 21954 bytes)
2026-02-10 09:37:18 system_server_pre_watchdog (compressed text, 17958 bytes)
2026-02-10 09:37:50 system_server_anr (compressed text, 12972 bytes)
2026-02-10 09:38:12 system_server_watchdog (compressed text, 18310 bytes)
2026-02-10 09:38:30 data_app_crash (text, 2682 bytes)
2026-02-10 09:38:32 SYSTEM_RESTART (text, 536 bytes)
2026-02-10 09:39:01 data_app_crash (text, 2682 bytes)
2026-02-10 10:14:05 data_app_anr (compressed text, 5699 bytes)
2026-02-10 18:41:22 system_server_pre_watchdog (compressed text, 20010 bytes)
2026-02-10 18:42:16 system_server_watchdog (compressed text, 20000 bytes)
2026-02-10 18:42:32 data_app_crash (text, 2683 bytes)
2026-02-10 18:42:35 SYSTEM_RESTART (text, 536 bytes)
2026-02-10 18:55:59 data_app_anr (compressed text, 23608 bytes)
2026-02-10 18:56:15 system_server_pre_watchdog (compressed text, 18741 bytes)
2026-02-10 18:57:08 system_server_watchdog (compressed text, 19135 bytes)
2026-02-10 18:57:25 data_app_crash (text, 2682 bytes)
2026-02-10 18:57:27 SYSTEM_RESTART (text, 536 bytes)
2026-02-10 20:13:44 system_app_anr (compressed text, 20181 bytes)
2026-02-10 20:17:22 system_app_anr (compressed text, 20322 bytes)
2026-02-10 20:24:26 system_app_anr (compressed text, 10669 bytes)
2026-02-10 20:24:35 system_app_anr (compressed text, 21120 bytes)
2026-02-10 20:24:58 system_app_anr (compressed text, 20300 bytes)
2026-02-10 20:25:26 system_app_anr (compressed text, 20820 bytes)
2026-02-10 20:25:32 system_app_anr (compressed text, 20527 bytes)
2026-02-10 20:26:01 system_app_anr (compressed text, 20368 bytes)
2026-02-10 20:26:36 system_app_anr (compressed text, 20903 bytes)
2026-02-10 20:26:42 system_app_anr (compressed text, 22029 bytes)
2026-02-10 20:26:58 system_app_anr (compressed text, 20291 bytes)
2026-02-10 20:27:54 system_app_anr (compressed text, 20322 bytes)
2026-02-10 20:29:24 system_app_anr (compressed text, 23165 bytes)
2026-02-10 20:30:06 system_app_anr (compressed text, 23081 bytes)
2026-02-10 20:30:58 data_app_crash (text, 2679 bytes)
2026-02-10 20:30:58 data_app_crash (text, 3043 bytes)
2026-02-10 20:32:00 SYSTEM_BOOT (text, 479 bytes)
2026-02-10 20:32:15 data_app_crash (text, 2679 bytes)
2026-02-10 22:03:21 SYSTEM_BOOT (text, 479 bytes)
2026-02-11 07:43:08 data_app_crash (text, 2679 bytes)
2026-02-11 07:43:09 data_app_crash (text, 3043 bytes)
2026-02-11 07:43:37 SYSTEM_BOOT (text, 479 bytes)
2026-02-11 07:43:58 data_app_crash (text, 2679 bytes)
2026-02-11 13:20:08 system_server_pre_watchdog (compressed text, 20243 bytes)
2026-02-11 13:21:01 system_server_watchdog (compressed text, 20182 bytes)
2026-02-11 13:21:18 data_app_crash (text, 2681 bytes)
2026-02-11 13:21:23 SYSTEM_RESTART (text, 536 bytes)
2026-02-11 13:22:15 data_app_crash (text, 2681 bytes)
2026-02-11 17:39:50 system_server_pre_watchdog (compressed text, 19711 bytes)
2026-02-11 17:40:43 system_server_watchdog (compressed text, 19588 bytes)
2026-02-11 17:41:05 SYSTEM_RESTART (text, 536 bytes)
2026-02-11 17:50:46 data_app_anr (compressed text, 16955 bytes)
2026-02-11 17:55:58 system_server_pre_watchdog (compressed text, 18824 bytes)
2026-02-11 17:56:52 system_server_watchdog (compressed text, 18867 bytes)
2026-02-11 17:57:14 SYSTEM_RESTART (text, 536 bytes)
2026-02-11 18:06:29 data_app_crash (text, 2665 bytes)
2026-02-11 23:50:09 system_app_anr (compressed text, 23127 bytes)
2026-02-11 23:50:10 data_app_anr (compressed text, 16446 bytes)
2026-02-11 23:51:40 system_app_anr (compressed text, 19340 bytes)
2026-02-11 23:51:51 system_app_anr (compressed text, 19848 bytes)
2026-02-11 23:54:47 data_app_crash (text, 2679 bytes)
2026-02-11 23:54:47 data_app_crash (text, 3043 bytes)
2026-02-11 23:56:55 SYSTEM_BOOT (text, 479 bytes)
2026-02-11 23:57:10 data_app_crash (text, 2680 bytes)
--------- 0.060s was the duration of dumpsys dropbox, ending at: 2026-02-11 23:58:04