I am also having this issues updating my Oneplus Nord since v23-220220401175185. My original recovery was recovery-e-0.22-q-20220228166119-stable-avicii.img.
When I try to install it downloaded then says “preparing for firstboot” then at about I am guessing 95% it just stops and goes back to the INSTALL prompt.
I do get pop up:
Updater
/e/OS 1.0 May 26 2022
Install error
Suspend
Information: my fingerprint reader never worked once I installed e, but it’s not an issue for me.
I used to follow this guide to manually install from TWRP when I would get similar results on other phones. I can’t seem to find similar in the e installer.
Link: [HOWTO] Update /e/
I just deleted the v1.0 update and trying to download again but on .23xxx it did not help.