Just a couple of days ago, security researcher Brandon Azad released his voucher_swap exploit for 16K devices (A9[X], A10[X], A11[X]), but the exploit didn’t support 4K devices (A7[X], A8[X]), resulting in some devices being unsupported by the recent updates to the Electra and unc0ver jailbreaks.
On a more positive note, hacking guru tihmstar seems to have a solution. Thursday morning, he Tweeted his version of the voucher_swap exploit, subtly named v1ntex. Astonishingly, the exploit supports 4K devices, whereas Brandon Azad’s exploit did not: