Thank you for the reply and clarification.
It's always cool when when you guys reply to customers directly.
Re missing locked video files. Unfortunately right after I posted my message I formatted my Sdcard. Actually even before reading your response, when I finished formatting it struck me that I should checked if the missing locked file was in the normal recording folder

.
Otherwise I'd like to share another issue I encountered and that one is more serious. While recording in driving mode, sometimes in a middle of a trip I would hear a voice notification "Video recording started 2 channels". First time didn't think much of it. When it happened again I thought it was weird. Normally you're supposed to hear this voice notification when you start the car /start the dashcam so I wondered if the dashcam was rebooting itself while driving.
I pulled the sdcard and sure enough I found compromised video files which matched the moment I heard the voice notification. Every now and then, the the video files (F and R) are cut off by 14s (2 min video files). I noticed them because the size of the corrupted files were smaller than the 2min long video files in the rest of the folder.
Watching the compromised footage, it would be recording normally until 1min 46s and then the video would end. Next video would start 14s later and you could hear the voice notification "video started 2 channels" just as I heard it while driving.
Obviously I would have lost 14s of driving footage.
Can't confirm for sure because when I was driving I didn't check dashcam but my guess based on the above is that the dashcam was rebooting and 14s was the time required for the dashcam to boot back up and start recording. Which would explain the voice notification stating video recording started. (not a heating issue or at least wasn't operating in a hot environment when it occurred, also happened during night drives at 15 degrees Celsius)
I updated the front dashcam firmware to V1.3.1_250214. Firmware obtained here
https://www.viofo.com/pages/firmware
And so far it seems to have fixed the issue. No more missing footages or random voice notification stating "video recording started" while driving. I inspected the sdcard and all the filles are 2min long nothing is missing.
And going back to the first problem I mentioned about missing locked files, it also seems that is no longer occurring with this new fw.
So happy with the new fw which seems to have fixed a few bugs.
Though I was wondering why there isn't a firmware for the rear camera available on the official site? Can it be found somewhere else? Noting that I do not want to install beta fw. Only a fw that is made public by Viofo.
Thank you