[GTALUG] timestamps on files saved by evince

I'm filling out a few copies of a CRA form (due tomorrow!). They are fillable PDF files. I'm using GNOME's "Document Viewer" (formerly called Evince). (The new name is confusingly generic.) All the saved copies have a "modified" timestamp identical to that of the original empty form that I fetched from the CRA. Has anyone else noticed this? This seems like a Bad Idea. Why would Evince go out of its way to backdate a saved file. I do like that file copying can preserve the original's timestamp but that seems wrong when a mutation is involved.