Go arounds are the norm at busy airports. Only 2 days ago I was spotting at LHR
when a BA
A319 landed on 27L and the IB
A321 behind did a go around and a JAL 773ER behind the IB
A321 also did a go around and traffic was switched to 27R but a BA
767 landing there also did a go around and after about 15-20 mins everything resumed to normal.