We have tried to fix the issue in the current release. Please update Illustrator using Adobe Creative Cloud application to the latest build for version Illustrator CC 22.1.
Please refer to our knowledge base FAQ – https://illustrator.uservoice.com/knowledgebase/articles/1844590 if you face difficulty in the update.
Ashutosh Chaturvedi | Sr. Quality Engineering Manager – Illustrator
Adobe. Make It an Experience.
PS: We are only referring to the issue that got introduced in CC 2018. As I can see there were few workflows that were existing even in older releases. Please log a separate request for it so that we all can track it better
An error occurred while saving the commentChris F. commented
I have had this issue before but I realized it is caused by guides within a grouped object. For some reason the new Illustrator treats guides as artwork in some ways, making the object "too big" and even effecting the listed size of the object.
All you need to do is clear the guides in the group and it fixes it but the way AI handles this should be fixed.