Detached Equipment and Blocked ball are two different rules under Rule 8-5. This can be in no way detached equipment. You only need to read the definitions to figure that out. It could be a block ball (8-5-G) if the judgement of your partner the fielder could not field the ball because the coach was in the way. However, this is a 2-base award from the tie of the throw. Did you partner award two bases? I would have loved to see that and how he explained it to the DC. There most likely would be an ejection at the end
This is nothing let it play out.