I believe below is for your recovery by downloading a FW 01.14.02.00 during the 2420th times of boot up:
02420,1980/01/06 00:00:00.000,C1070200,BOOT_HOLD=6,SMART_RECOVERY=yes,DOWNLOADER=boot,VERSION=INTERNAL_?_SWI9X50C_01.14.02.00_?_?_?_?,TYPE=SPKG,STATUS=PASS
02420,1980/01/06 00:00:00.000,C1070200,DOWNLOADER=boot,VERSION=9999999_9907259_SWI9X50C_01.14.02.00_00_GENERIC_002.035_003,TYPE=FILE,STATUS=PASS
02421,1980/01/06 00:00:00.000,C1140200,COPY_FROM_BACKUP=/swir/nvdelta/NVUP_GENERIC.010,STATUS=PASS
02421,1980/01/06 00:00:00.000,C1140205,BOOT_HOLD=3,DOWNLOADER=boot,VERSION=9999999_9907259_SWI9X50C_01.14.02.00_00_GENERIC_002.035_003,TYPE=FILE,STATUS=PASS
02422,1980/01/06 00:00:00.000,C1140200,COPY_FROM_BACKUP=/swir/nvdelta/NVUP_GENERIC.010,STATUS=PASS
02422,1980/01/06 00:23:36.267,C1140200,IMAGE_PREF=01.14.02.00, GENERIC, GENERIC_002.035_003
02423,1980/01/06 00:00:00.000,C1140200,IMAGE_SW,CURR=01.14.02.00 GENERIC_002.004_001,PREF=01.14.02.00 GENERIC_002.035_003,CALC=01.14.02.00 GENERIC_002.035_003,COMMENT=START
02423,1980/01/06 00:00:00.000,C1140200,IMAGE_SW,CURR=01.14.02.00 GENERIC_002.035_003,PREF=01.14.02.00 GENERIC_002.035_003,CALC=01.14.02.00
So above that line, I don’t see anything showing why it stuck in boot and hold mode
If you are not able to reproduce the issue, it is hard to troubleshoot