Date & Time: 28th April, 8.48pm BST
Frequency: Every time
NPC name: Produce Producer
Class/Level: all
Party or solo: solo
In-game time: 8pm
Area and coordinates: Island Sanctuary, 12.8 x 26.9

Steps:
1. Speak to Produce Producer
2. Select "purchase seeds"
3. Attempt to buy any kind of seeds
4. Confirmation question partly in Japanese with everything set to English
(was all English this time yesterday, before the patch)