Drop shadows rendering differently after updating from 25.0 to 25.4.4
This is causing a lot of headaches in our department. The drop shadow appears to have gotten smaller after updating to 25.4.4, even though the values are the same. This edit is destructive and cannot be resolved by reverting to 25.0 and resaving. Attached is screenshot showing drop shadow changes. (AI file is larger than 50 MB.)

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This change, whatever it is, was made 2 years ago :( I wish you have reported it sooner... maybe it’d help to notice and fix it sooner... perhaps some optimization? It'd probably won’t change back, and the only option I feel is left is to tweak the shadow to have a proper look, to write down the values, and to 'fix' all existing shadows. A tedious job :(
Still I think you should share the file for the team to look at it.
Please upload it elsewhere and send the download link to sharewithai@adobe.com, and put the link to this report for tracking: https://illustrator.uservoice.com/forums/601447/suggestions/46166314