1.8v constant at 0-10v signal pin

Hello all, I am fairly new to the world of grbl (2 years experience with lasers) and openbuilds. Learning as I go as one would. I just bought the x32 for my 1515 cnc build. I have the 0-10v pin controlling an HY VFD as per the instructions and YT video on another thread. My problem is that when I turn on my VFD and my spindle continuously spins at low rpm (I assume 18% of 24,000). After some diagnostics I found when my signal wire is disconnected from the vfd it has constant voltage of 1.8v at m5 state. I should also note that my signal wire is shielded and i have ferrite core attached. When I max the signal I have 11.8v. I tried tuning the voltage adjustment to 10v but get the same constant voltage when it should have none. So I could assume if the 1.8v were not present the max signal voltage would then be 8.2v. So I adjusted the voltage back to original setting. I am at the end of my experience and research and now seeking help.
My spindle settings are;
$30=24000
$31=0.000
$32=0
$33=5000.0
$34=0.0
$35=0.0
$36=100.0
Wondering if anyone else has run into this issue and if I overlooked something simple?