Ah, that’s a shame, they placed the barriers on an area around the town that had never had an eruption (just lava).
Looking at the live videos I have to admit I had to laugh initially, it looks so much like Mother mature just saying FU to our attempts to control her, it stops for the barrier, has a gap, then pops up again just outside town. (Man made lava barrier route (ish - as far as I can see, guessing in the distance, if even built) highlighted - it even left a nice gap for the barrier!)