I would generally say that installing the latest version is a good idea, thus T, it has been around since about September, I am uncertain how many /e/ users have installed it or left feedback on the forum; here is a forum search, please keep reading. 
and, yes, it would requiring update to factory Android 13.
Regarding collection of more information
- OnePlus - 8 - instantnoodle - Documentation Suggestions
- Reading the Lineage install page can be useful https://wiki.lineageos.org/devices/instantnoodle/install/.
In this post Oneplus 8 stuck in fastboot we see the mention of fastbootd this means that the phone has dynamic partitions. My experience of dynamic partitions is that work must be done in the correct sequence.
Feel free to comment on the Gitlab issue.
Edit I also added the checksum mismatch to the Gitlab issue here https://gitlab.e.foundation/e/backlog/-/issues/7213#note_487713.