Kyle Palmieri, Brock Nelson, Mat Barzal (1G, 2A), Bo Horvat (1G, 1A) and Noah Dobson (1G, 1A) scored for New York, but the five-goal performance fell short against Vancouver's six tallies from Brock Boeser (1G, 2A), Oliver Ekman-Larsson, Elias Pettersson (2G, 1A), Anthony Beavillier (GWG) and Nils Aman.
After only allowing two goals total in a four-game win streak, the flood gates opened as the Islanders allowed six goals for just the second time all season and first since Dec. 6. In the process, Ilya Sorokin's shutout streak ended at 144:00, as the goaltender let in six goals for the first time this season.
"It just wasn't a good enough effort," Noah Dobson said, who scored with 0:49 left in a last-ditch attempt at a comeback. "[Vancouver] competed hard. We have to find a way to match that."
The offense wasn't an issue for New York in the loss, as the Islanders put up five goals, scoring four or more in back-to-back games for the first time since Dec. 23-27.
The Islanders top-ranked home penalty kill had an off night in Thursday's loss, allowing two power-play goals at home for the first time since Dec. 2 against the Nashville Predators.
With the regulation loss, the Islanders (59 points) missed a chance to leapfrog the idle Penguins (59 points) and Capitals (60 points) and jump back into a Wild Card berth.