**Yes.** The way you can parse it is:

> A creature must also make this saving throw when [(it enters the spell’s
> area for the first time on a turn) or (ends its turn there)].

Clearly, the conditions are:

- The creature enters the area for the first time on a turn
- The creature ends its turn there

Note that this is different wording than something like *Cloud of Daggers* which says:

> when it enters the spell’s area for the first time on a turn or starts its turn there.

Whether this was intentional or a mistake is a different matter.