The last month we (the design team I'm part of) have had an issue with Illustrator auto scaling fill patterns smaller by a lot when moving sketches from one file to another (by dragging or copy + pasting it). For example pattern might be scaled to 30%, and then when pasted into a new document it will suddenly be scaled even smaller (like it has been scaled to 30% again or even smaller). And this is a recent issue, we have not had this issue before last month, and nor have we changed our process for moving sketches from one document to another

I am having the same issue, is there any fix???

fashion designer here, this is a huge problem because you need a pattern to remain fixed in size in relation to the shirt (as an example) that it's going on, and you need it to stay fixed as you copy and paste that shirt into multiple documents, so that others (buyers, salespeople, factory) see the pattern/shirt exactly as you intended it. this has never been a problem in the past, but now I'm spending hours per style to manually fix each file as the shirt gets pasted into it. this involves way too many steps that I shouldn't have to take, and opens the door for error. This needs to be fixed NOW, totally unacceptable.

Having the same issue here, it just started this week - it’s a real problem since we do fashion CADs and we’re constantly copy and pasting vectors with pattern fills from one file to another. And the scale of the patterns are a crucial part of the design specifications so being able to keep it consistent is quite literally a business need.

We’ve already double checked the Settings and nothing has changed on our end. There doesn’t seem to be a solution other than having to manually re-size every time we paste into a new file.

Adobe - a bug fix / solution would be much appreciated. Thank you!

I too am having the issue when I copy a CAD with a swatch fill to another document the swatch pattern is shrinking. I have also checked the canvas size for both documents. My version is 30.2.1. This issue started on Monday. I am using a PC if that matters. I have uninstalled and reinstalled Illustrator and still the issue persists. I just emailed you a file tor review. Thank you!

Ah, I see, the zoom check shows it’s a normal canvas... well, then the document is definitely required.
Just one object in it with the swatch applied should be enough to test it.
You can also send this file privately to sharewithai@adobe.com (in this case mention the link to this report, for tracking it back — http://illustrator.uservoice.com/forums/601447/suggestions/51042046)

When you say 'CAD drawing' — do you mean 'an artwork imported from a CAD app' or something else? Illustrator is not considered a CAD software, but a vector-based graphic design tool.

My guess is that the first document is created in the large canvas mode (with ×10 invisible scale factor), and the other one is normal.
To test this, try to create an artboard larger than 227 in (~5766 mm) in this document — it Ai would let you do this, it is a large canvas doc, and my guess is correct.

If not — can you save a copy of the source document, remove everything but the object with the swatch applied, and share here, so the team can try to review it?

Besides Jessica there are 2 more mentions at this moment on the Illustrator forum: https://community.adobe.com/questions-652/swatch-pattern-in-my-cad-reduces-scale-when-i-copy-and-paste-it-into-another-illustrator-document-sometimes-the-actual-cad-itself-will-also-shrink-how-do-i-stop-this-from-happening-1551372?tid=1551372&postid=7506909#post7506909