I'll take a look at that today but full-width view is the only one where I try and keep the cards in memory since the height is more dynamic than the other views. The list views are the most lightweight as I'm only loading small thumbnails.
FYI Report reason was added in the 1.0.93 beta which is hopefully live by the time you're reading this (if not probably an hour or so from the time of this post).
What view mode are you using? If it's full-width does it happen with the other modes? And just to confirm this is the latest version? Regardless I'll take a look! I know I do keep the full-width posts in memory as I haven't found a good way yet of releasing them without making the scroll up janky.
Testing the HTTPS version of that link https://news.ycombinator.com/item?id=36796188
Edit: ok I think if I convert the protocol from http to https it works, will be fixed next release.