Your fault?

No it was JLCPCB. LCSC was fine. The problems lasted a couple hours. Guess they were maintaining their databases or something, and nobody works the day after christmas, right?

For those wondering why one would look for parts on JLCPCB, they probably haven't used JLCPCB's assembly service yet.
While their main distributor is LCSC, they do *not* use the same LCSC channel (and thus, stock) than the LCSC distribution channels accessible to everyone else. JLCPCB's stock is completely different. You'll find out the hard way if you have to deal with JLCPCB.
Now they can use "global" sourcing otherwise, but it takes 10 more days on average and is significantly more expensive.
So, just for those who wouldn't know yet. It's cheap but you get what you pay for.