We have provided a registry protected fix, some users confirmed that this worked for them.
Could you please try this at your end as well and let us know your feedback?
Kindly make sure you are on the latest DC build(20.012.20043) and then follow the steps from the attached word file: “Steps.docx”.
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Takes longer to open the comments panel of a 6.4 mb PDF than it takes to open a 3.5 gb photoshop file. Just embarrassing Adobe.