App stuck in 'Waiting for review'

Hello App Review team - My app(App ID: 6756242440) is stuck in 'Waiting for review'. Once in a while updates are getting stuck like this, while other times same app reviews go through in 48 hours. Please help us understand any reasoning behind this so we can plan our development accordingly.

Thanks in advance!

App stuck in 'Waiting for review'
 
 
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