ChromeOS Version 65.0.3315.0 (Official Build) canary (64-bit)
Firmware Version Google_Samus.6300.174.0

# Turn on ChromeVox using ctrl + alt + z
# Go to a page with many links such as https://en.wikipedia.org/wiki/Cat
# Navigate to and invoke any link such as mewing
# Press alt + left arrow to go back
Expected: focus/selected link are the same
Actual: Page is reloaded with focus on the top of the page

Note that behavior is as expected in Chrome browser on Windows
Google Chrome	65.0.3311.3 (Official Build) dev (64-bit) (cohort: Dev)
That is, when pressing alt + left arrow it retains the focus. 
This behavior is reproducible using keyboard only and is not dependent on any one screen reader.