Isn’t that button in the toolbar at the bottom? How would you get back to the feed if you went to your inbox?

To either not have the posts button when on your feed, not have an inbox button when on your inbox etc

Or just have the posts button not do anything when you are on your feed. Currently it acts like the communities button and it is annoying accidentally tapping it and losing your place.

I use a swipe back gesture in that instance, and it seems to resume my place. But I rarely use the bottom toolbar buttons.