By Karolos Grohmann BEIJING (Reuters) – COVID-19 cases inside Beijing’s Winter Olympic Games bubble hit the second highest since arrivals began after 45 new cases were detected on Feb. 4, but organisers say the situation is under control and cases confined to the ‘closed loop’. The cases among Olympics-related personnel were up from 21 a day earlier while cases in the bubble that restricts the movements of Games participants, reached 19, compared with seven a day earlier. Feb. 2 saw the highest daily figure in the loop so far with 26 and the highest total daily figure with 55. Games organisers…