This is not the first time that Zelda fans have found a way to catch Korok's easy seed, but simply.
Where previous exploits require time and skill, this requires you to reach the top of the Akkala Ancient Tech Lab and draw near the point where you will have an opportunity to press "A", then quickly back down to quickly disappear, but then press "A ”However.
If you do it well the camera will cut to a few angles before giving you Korok seeds. And when it finally recovers, you will still be on the roof and the speed is back, allowing you to do it more often.
Here's a vid from Playback Renewed which shows the exact way to remove it:
It's a sad job, but it's a trustworthy job. In fact it is also less reliable, so is it easier?