Stroke will not appear on object

[bretwoodh77667362]

I'm runinng Ilustrator CC 23.0.1, and my workflow involves bringing very large vector objects into Illustrator via an SVG from QGIS 2.18.24. Every once in a while, the object I bring in will not appear to have a stroke, but Illustrator will claim it does have one. No matter what I do to manipulate the stroke, including removing and re-adding, changing width, etc., has no effect. It remains without a stroke in appearance. I've ungrouped the path, simplified it, expanded it (when set to no stroke), and made sure it wasn't a compound path. I've restarted Illustrator. None of these things have an effect. However, if I expand it when I have a stroke width set, it will expand properly, showing the outline of the non-existant stroke.

There is one intriguing little exception - when there is an extremely sharp corner in the path, a bit of stroke will appear. Strangely the shape of this fragment of corner is not affected by changing the corner, end, or stroke alignment, though it seems like there should be some effect.

[EDIT: Apparently the strange bit that did have an outline was an isolated separate bit of stroke, not just a sharp corner.]

This has happened before, but I'm against a wall in this case - I don't have a good workflow option to get around it.

I'm assuming there is some property in the SVG that is interpreted strangely by Illustrator, and is leading to this bug.  I was wondering if it had something to do with the direction of the stroke, so I reversed that, but no effect there either.

I attached a screenshot showing relevant settings in a very zoomed-in section with the strange corner effect.

[MK178]

I had the same problem. with your suggestion now it works!!!!   THANK YOU

[jonnyharm]

I have a similar problem with an svg file of a qr code created on a website. I open up the svg in Illustrator and the black on transparent qr code is defined as a path in the appearance panel. However, im unable to do anything with the piece and it looks and acts as if it is a raster piece. Unable to to expand appearance, unable to release compound path, unable to add a stroke, unable to apply any pathfinder function, uable to see individual anchors or path outlines, unable to image trace, AND unable to select any clippings mask option from the top menu. Clearing the appearnce made it disapear without any outlines. After tweaking out for sometime in frustration I opened the transparency panel and noticed a mask. I released the mask and problem solved! So lame! I would feel like a complete idiot had it not been for the fact that all the mask transparency settings were greyed out in the dropdown menus above with the exception of flatten transparency. I gave flatten transparency no mind during my troubleshoot becuase duh, it was an already flat blak and white single layer vector file with no effects etc (except for a redundant transparency mask, cheap qr generator sheesh). So frustrating. ^(*￣(oo)￣)^

[dougvankampen]

HEY! After an exhaustive troubleshooting session (reinstalling and whatnot), I ended finding a solution. View>Pixel Preview. Viola!