Because CCP activated the Upwell capital hangar for NPC stations. The problem is that Jita has a special hangar that seems to interfere with the Upwell hangar transition or something like that, and CCP simply has not tested this or even cared. The patch notes also don’t say anything about that being a planned feature, so it might just be that someone at-fingered something unintentionally. Radiosilence by CCP since last week about this since last week doesn’t help either.