I have a 2018 Ram 2500 Diesel. Since I WFH and don't drive my truck very often. I installed the NOCO genius2d last year which seem to be working. This fall added a 2 way plug to this for the block heater. I started to notice that now the dash lights will turn on and off every 30 seconds when this is plugged in. I tried some troubleshooting on this by unplugging everything, dash lights stay off. Plug-in just the battery tender, dash lights on and off every 30 seconds. Brought I new NOCO genisu2d same issue. Plugged in my old dual rate battery charger set to 2 amp, dash lights on and off every 5 seconds. If set the dual rate charger to 6 amp, dash lights stay off.