<span class="link_user">@Thedibber</span>,
I was away on vacation for 11 days and monitored the plants only through camera ā everything else was fully automated. One out of four plants has turned yellow, while the others are still green.
It looks like a nitrogen deficiency with āburntā leaf tips that are getting crispier over time. Not sure though, since all plants are getting exactly the same treatment. Iāll try supporting with some extra nitrogen and see how she reacts. Really strange that only this one shows the issue.