It's not just eBay. I have seen this behavior on other sites as well.
Maybe a browser glitch but in my experiences this kind of thing has a
reason and it usually involves making money or saving money.
Glad to see I'm not the only one with this problem. I'm sure it's some
kind of marketing ploy to get your attention or gallery view has proven
to make more sales. Tired of being manipulated by technology. There is
often a reason behind a "glitch".