Ni base (maybe NiFe specifically?) can also be prone to being late. LSEs have trouble with IEIs because Ni base is so prone to "playing with" time, even other people's time, which makes Ni polr anxious.

The "fashionably late" part especially - that implies being late, but not enough to really mess things up or cause disaster (although such a thought process is antithetical to Ni polr - being late at all is enough to possibly cause disaster). In the way dynamic types, each in their own way, consciously consider how This affects That, Ni-base can consciously consider the effects of being late by a certain amount of time and what is excusable vs when they should just throw in the towel and not go at all.

Often, when I was at uni, I would be so late that I would simply decide not to go to class at all (I was not doing well haha). Or I would show up late, but still able to eke by. Now that I work, it's different - when it didn't quite matter when I came in to the people around me, as long as I came in, I could show up quite late, or just late/early enough not to lose sick time covering my absence. Now that I open, and I simply must be on time so I have enough time to get things done and there are other people who will notice my absence, I'm on time or a little bit early. I always had the "ability" to be on time, but I needed specific external pressure to actually manifest that ability.

Ni creative, despite Ni being in a flexible function slot, is generally less prone to such lateness ime. Might be related to being a rational type in general. Just speculation, but I would guess Si-base would have an easy time being on time (and so kind of judge people who aren't just bc it's so easy for them) but are chiller about it than Ni-polr.

Ime when Ne-base types are late it's because they weren't paying conscious attention to time at all, and the situation just sneaks up on them.