"Waiting for Review" for minor update approaching a week (always previously a few hours to next day max)

The iOS edition of the app was reviewed in the usual time (a matter of hours) but the Mac version has been pending since last week although it's just a minor update. Prior updates were generally reviewed same-day or at most next-day so in my case this seems unusual. Are there general severe delays going on with macOS reviews or is there a glitch in the review processing system?

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"Waiting for Review" for minor update approaching a week (always previously a few hours to next day max)
 
 
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