it's not late but i think the constant loud environment where she is always exposed to too much noise and shouting makes her react in the same way, as she knows no other way at the moment.
if possible, take a break and go somewhere else for a few weeks. it may help her calm down a little. at this age, she will start expressing her emotions and sometimes it may also come out as anger and shouting, which is normal, but not at all times. make sure that you also take a soft approach and speak nicely and don't shout or raise your voice. it will take time but i am sure it will gradually help
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