loaded 502 and latest Cerbo to 3.0 to, 3 x 10kVA Quattro in 3 phase config, running ESS system, have a 3 phase 20kVA generator for backup on AC 1 when the generator is active the time out for warm up is all good, on battery condition met and cool down phase goes to inverter then grid as normal to ESS mode once the generator stops it goes to inverter for a few seconds then back to ESS this is annoying any ideas to why.(there is no cool down timer active in generator controller)