Blink runes seems to get caught up on rail tracks (i.e. if you cross a track on the blink path, it stops you at the track), whereas a cliff edge often doesn’t. The cliff edge may be intentional, but I don’t think the rail track are, which is why I am bug reporting it.
oh interesting thanks for the report. Will send along to the team! 
Since posting this I’ve noticed small ‘steps’ in height on the floor can also block Blink (but seem flat when you run over them). This is particularly noticeable in the Namless Pass as you come up past after the waterfall gate near the second teleport spot inside the quarry area.
thanks for the additional information! I will include that in the ticket!