I just bought a X108G yesterday. When connected to a auto tuner, it throws back the power very soon, so the tuner is not been able to find the best SWR. I have this with both of my automatic tuners, which are the LDG Z100, and the MFJ993B. Mine has firmware 1.00.4 from may 7th 2017. Sernr. start with X11. I'm wondering if there is a solution for this.