Using WebStorm Build 2022.2.3 (#WS-222.4345.14, built on October 4, 2022), my Navigate Back shortcut (either keyboard ⌘[ or menu Navigate → Back), it seems as though the feature is working but ignoring the cursor position.
So, if I navigate back to a previously opened tab, WebStorm shows the previous tab, which seems fine.
But, if a step in the navigation moves to another position on the same page, it seems to be ignored. Nothing happens.
So, a series of Navigate Back steps result in a combination of working and not working, depending on whether the tab switches.