Volkswagen told us that they'd fixed the issue and weren't pursuing it further. In our experience driving a few of the newer 1.5 models (we had a Volkswagen T-Roc for about 3 months, and now have a Skoda Kamiq 1.5-litre for 6 months) - there are no juddering/hesitation issues. This is our own experience of those two cars, but we don't get complaints about any new models with that problematic engine. We do still get the occasional message about problems in 2017/2018 1.5-litre Volkswagen Group cars though.

What I would do, if you want the car, is send an email about the issue asking for confirmation that it's been fixed/won't affect your model. That way you have proof if something goes wrong. I'd also be asking to test drive the car if you can.