On iPhone, swipe through the images on https://smartslider3.com/wordpress-carousel-post-slider/. Note that the bullets often disappear. This seems to be a repaint bug; the bullets pop into a layer then back out, but when losing a layer, we don't seem to repaint the correct region in the enclosing layer.
Possibly the same as bug 204120
<rdar://problem/60850052>
Dup of 204605. *** This bug has been marked as a duplicate of bug 204605 ***