in TWRP documentation for A/B devices with super-partitions also called dynamic partition we find some advices :
- reinstall boot.img (foundable into the /e/.zip) using TWRP install feature.
- Alternate Installation Method: Once booted, navigate to the Advanced > Install Recovery Ramdisk option. This will ask you to select the image you want to install TWRP from. Select the TWRP image you just downloaded and copied into device storage. Proceed to install this image.
- You also need to use the “Fix Recovery Bootloop” option present in the same Advanced Tab. Use that option after you have installed the recovery ramdisk successfully to avoid boot loops happening from installing TWRP Permanently.