Captain reported EICAS messages did not match the diagnosed Flap/Slat systems failure and elected to perform a go around. After retracting the flaps/slats; the EICAS messages disappeared and a normal approach and landing were made.

Narrative

While on approach to Runway XX at ZZZ upon gear down and flaps five selected we received an oral caution alarm. I the Flying Pilot immediately looked down with the corner of my eye and saw Amber dashes and 3 surrounded by Amber boxes on both slat/flap. I was expecting to see an EICAS message of slap or flat fail instead I saw wind shear fail and ground proximity fail. At this time I deviated from the normal go around procedures by hitting altitude hold. I told the First Officer the Non-Flying Pilot inform ATC we were going around. I might have the sequence wrong because everything happened fairly quick so I don't recall if at that point it is when the auto pilot and auto throttles fail or if ATC told us to climb and maintain 2;000 ft. came first. Regardless that's when I hit TOGA the oral unit started going off stating go around throttles not in TOGA. My first concern was since I was now hand flying and we were only a few hundred feet from 2;000 ft. I intentionally held back the thrust levers so we wouldn't go through the altitude. I will admit I got a little bit behind the power curve because first I was having to hand fly the go around and second I was confused why a flap/slat fail message was not showing up when we had amber dashes and #3 in boxes and the EICAS messages we were receiving had nothing to do with a slat flaps fail. This caused me to delay the standard call outs; when we were instructed by ATC to climb and maintain 3;000 ft. The Non-Flying Pilot was a great help and assisted in the stander call out and as we cleaned up the aircraft and all the messages and amber boxes went away. Since there were no more messages and therefore no QRH checklist to run we circled around executed another approach configured early and the second approach and landing was uneventful.