OTG Support - Minimum Battery Level or not?

Is there a minimum battery level for OTG support to work?
I have OTG support on my Mediatek Blackview BV6000 which works very well.

However, sometimes when I connect say a hard drive to my phone (via OTG) the hard drive doesn't start and the phone doesn't see it.

This seems to happen when the battery level drops below 70%, but I'm guessing.
This happened again recently so I went and charged my phone and the OTG support came back.

I'm wondering if this is due to some internal mechanism built into Android 7 or the phone where OTG support is stopped when the battery level drops below 70%. Has anyone ever heard of this?

If so, is there any way around it?

I recently learned to use a 'Terminal apk' to change the internal settings of my phone to allow my 'file manager' to see my hard drive when attached to the phone. It now works great. I was hoping that there would be a similar method to override this 70% limit for OTG support if that is in fact the problem.

Can anyone help?