I made six similar and simple designs with a photo and text on top with stroke. The stroke on the tilde looks fine in Illustrator, as shown in this screenshot:
I exported the several files as PNG to print on A1. Each export took 5-10 min and I sent them to the service bureau. I later realized that the tilde was cropped on all designs that had a stroke, as in these examples:
and was fine on the design that did not have a stroke:
The stroke is from the font, I did not expand the appearance of the text. I suspect that this is a known glitch because the cropping is consistent across exports and does not happen with a font that has no stroke. I am using macOS Mojave 10.14.6 and Adobe Illustrator CS5.1 (very old, I know).
Can I avoid this cropping glitch when exporting to PNG?
Update: To answer the comments:
the tilde is the front-most element. The object at the top, which looks like a leaf, ends at the visible edge and has no invisible elements.
the file sizes seem huge to me: between 9 MB and 27 MB.
I preferred to export as PNG because I have a single design with a layer for each background and I turn them visible or invisible before exporting. With a PDF I would have to make 6 copies, then delete the 5 extra layers from each copy 6 times, which I found cumbersome, especially if I then notice a glitch that I need to fix on the designs already saved.
I dislike saving designs with raster images as PDF because I've had file size problems (see PDF only with JPG photo is 7 times larger than original).