Apple unsigned iOS & iPadOS 13.5 on Monday in a move intended to prevent downgrades to a publicly available jailbreakable firmware version. Hacker and unc0ver lead developer Pwn20wnd quickly responded to the act this week by releasing unc0ver v5.2.0 with support for iOS & iPadOS 13.5.5 beta 1, providing jailbreak hopefuls with a second chance to upgrade to jailbreakable firmware.
But as it would seem, this was a short-lived hoorah. Apple appears to have stopped signing iOS & iPadOS 13.5.5 beta 1 as of last night, effectively and once again preventing iPhone and iPad users from installing a jailbreakable firmware for the second time in the same week.