I sometimes get crashes browsing the feed for Newsroom (https://www.newsroom.co.nz/feed/rss). The crashes seem to happen when there are at least 20 unread articles, and I scroll down the list. The feed includes fairly large images and drawing the previews can be quite noticeable, even on a recent high-spec phone.
I can sometimes avoid the crash if I scan the titles, and then use Mark Newer Read from an article at the bottom of the screen. Or completely avoid it by disabling the ‘Show Image Preview Thumbnails’ preference.
Newsblur v7.1.0 on Android 8.1