The antenna is a cooling issue. The extruded filament hasn't had enough time to cool because the print area is so small. I once had the exact same issue. The filament fan needs to be high for those small pieces. The center area looks to be the same issue when I magnify the picture. The middle sphere looks like it came out alright- more time per layer and less extruder tip heat in the same little spot. You should be able to use the Regular/Maximum fan speed threshold to get better cooling for the small melted areas. The default 10s threshold is probably fine to use. The fan should then crank up for those smaller areas and they should come out much better.