Not sure I would assume that it is just a printing issue because I do not think the IRS knows whether your return is supposed to contain IRS 8582 page 3 or not. A tax return without IRS 8582 page 3 can still be a valid return. Plus, if page 3 does not print even when you are trying to print all forms required for paper filing, that definitely begs the question whether page 3 will in fact get packaged and submitted for e-filing.
While there is some cursory content validation, my understanding of the e-file acceptance criteria is that they are a lot more procedural and structural and format driven. You can get a sense by reviewing some of the published validation / e-file rejection errors and solutions.
Do you have an IRS.gov account? If so, reviewing your IRS tax return transcript might provide confirmation of whether IRS Form 8582 page 3 actually got transmitted.
