The dash is really it. Also, it does not damage any standard dash materials. It peels off without too much difficulty and has not left residue when I have done it.
If you have a standard vinyl or leather dash, I wouldn't worry about it. If it is velvet or flocked, it won't really work.
FYI: The Amp mount is just a short row of neodymium magnets in a plastic base with an adhesive on the bottom. The Amp has a metal plate in the bottom that could stick to any magnetic base.
Just an example: https://www.amazon.com/WizGear-Universal-Dashboard-Swift-snap-Technology/dp/B01MR4AO9D
There are tons of different magnetic mounting versions on Amazon.
Huh yeah that's really odd. I've used this configuration all year long with ZF2 and earlier today with ZF3 with no issue... And these are the same mount I've used since... Maybe my s9/s10/s20 era.
My only other hunch will be that your mount has a much stronger magnetic field compared to mine? (I think mine is 4 magnets, is it possible yours is 6 magnets version? I tried looking for details on that Amazon page but found nothing)
If you're curious, maybe try a different mount to see if it's still the same issue?
I've used these:
Magnetic Phone Car Mount, WixGear Universal Stick On Dashboard Magnetic Car Mount Holder, for Cell Phones and Mini Tablets with Fast Swift-snap Technology, (Rectangle Stronger Design) https://www.amazon.com/dp/B01MR4AO9D/ref=cm_sw_r_apan_glt_fabc_YQETYC9H5P3345JZCJGD?_encoding=UTF8&psc=1
Magnetic Car Phone Mount, Apps2Car Stick On Dashboard Magnet Phone Holder for Car, Dash Mount Cell Phone Holder with Strongest VHB Adhesive, Phone Magnetic Holder for Car, Magnetic Phone Dash Mount https://www.amazon.com/dp/B077GSJTJ3/ref=cm_sw_r_apan_glt_fabc_E6N3ZXAA8QPQ6WCKR2TB