Firstly, sorry if I'm making any mistakes in how I'm posting this. I love the app but there are two main issues that bug me and they both pertain to external links.
Let's say I followed a link to a Wikipedia article, and within that article clicked a link to a second article. If I then press the back button (on the android bottom bar), it takes me all the way back to the Lemmy comments, not to the previous article. It would be much better if it just took me to the previous page I was on.
Also, now that I have been returned to the comments, they are completely reset. It would be much nicer if my location in the comments were preserved, as well as all collapses, so I could seamlessly continue from where I left off.
The persistent comment location thing would be extremely nice. One of my main gripes. For the article problem you're having, have you tried enabling the "use 3rd party browser" setting?