As commented in issue 23902 (Option to keep file selected in sidebar without forcing a scroll)
- If set 
autoReveal to true, the jumping inside file explorer is confusing; 
- If set 
autoReveal to false, I have to use showActiveFileInExplorer keybinding or right click menu every time when switch between tabs 
But with VSCode 1.46 (May 2020) you now have:
Explorer auto reveal focus without forcing a scroll
There is a new option focusNoScroll for the explorer.autoReveal setting.
When using this option, the Explorer will automatically select files when opening them but will not scroll to reveal them in the Explorer view.