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Because 4.36.9.139 is the last version of public release firmware available for all V3 cams to update.
That is correct. There were two versions of 4.36.10.xxxx that were offered very briefly for OTA update after 4.36.9.139, however both were very quickly halted due to event recording issues. Anyone who didn’t update was cut off from moving to 4.36.10.xxxx. Anyone who did update was then offered a fix to those two versions in 4.36.10.3406 which is only available OTA to cams already on a 4.36.10.xxxx version. It is, however, publicly available for manual download and flash update.
Hopefully this newest version, or the next beta, will prove stable enough to be released OTA to all V3 cams.