There is no excuse for anyone on the Crucible design and development team having a job at this point.
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There is a 2 main bugs: 1st with invisible weapons and players - it happens when you change weapon in armor during match. You can avoid this one if you don't change anything during match. 2nd one is in competitive - it happens when you expand loading (with open menu or smth) between rounds. To avoid this need to don't do anything while round in competitive loading.