Try flashing immediately after ROM install in TWRP.
Hmm I installed first magisk 18.1 (not 19.1)
Maybe it modifies the kernel, so that the recovery is bootable :confused:
This one works for me mate.
& thanks for bo...
If you want root then download magisk and use the create patched boot image option.
May I know how to revert back to stock, I already rooted through magisk as you said.
I rooted properly without any issue but can't install some gam...