I have parental guidance switched off but thought I noticed another strange bug with guidance marked programmes yesterday. Confirmed it today when started to watch The Serpent which all episodes are marked as (G) in the folder.
It would appear if the programmes are in a series folder playing one episode removes the (G) flag from that episode and all the others in the folder. No password is required to subsequently delete any episode. This is not great if you want to protect content from minors.
I have set-up another daily broadcast (G) marked series to test further, obtain some screenshots, and I will report the findings to Humax Support.
Be interested if anyone else has noticed this, or if it happens when parental guidance is on.