Hi @K-Stute
as long as it's not low resistance (<1kohm), the TVS/Protection diode should still be functional. Otherwise, you could see a short <10-20 ohms).
Since you have the power module in parallel with the battery leads, it is likely you have a lower reading than mine, and your DMM may be using a different technique to charge the node, so I am not worried that you have a different reading.
I do think it is troubling that your voltage drops after it is turned ON, since that is indicative of some hardware issue downstream of the power supply, or the power supply itself cannot handle the load.
When you use a battery, do you still see the input VBAT drop down to 6V?
Also, to confirm, you are using a VOXL 2 with the M0049/M0117/M0134 ESC and our Power Module at 5V, right?
I ask since nothing in that configuration refers to our products as "mini" so the post title may be a little confusing. So, just wanted to clarify.
The advice from our team is to disassemble (unfortunately) each item and test individually with a known good working power supply so you can monitor the current. Especially since we do not want any HW issues to propagate and cause more damage to other devices in your system.
Then, when you re-assemble and connect motors, switch over to battery power.
Hope this helped.
Thanks!