As me and many others, you might have encountered the problem, that tapping on a comment in your inbox doesn't get you to the comment and it's context. However, you can actually directly jump from the comments inbox to the correct comment + context in the post.
Check the image. First long press on the upvotes/time on the top right, to have the lower bar expanded. Then press on the chain link button below to directly open the post!
It was hard to find and know unless you already know it. This definitely needs UX improvement. Hence, this post here.
That's a weird bug. If you set this one - Notify me of new threads in a subscribed magazine - even that one doesn't show notifications? But I guess it's weird it's not notifying you of my replies to you, it should at least do that. If I didn't get notifications of your responses, there's no way I'd be able to know about it I think :/ Sorry you're experiencing this.