I tried searching for a word in a long post and the behaviour was different from other apps.

Example: within a certain post, I search for the word ‘house’ and get 25 matches. So I tap on the down arrow in the search box to visualize each matching item one at a time, but the post doesn’t automatically scroll down.

To replicate this, you can try with one of my posts here and try searching (three-dots>Find in page) for ‘F-droid’. The highlighted matching item will work as intended and go down, but once it’ll pass the bottom of the screen, the post won’t scroll.