Qualcom Crashdump mode while trying to fastboot to twrp

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New member
May 11, 2021
Im trying to install twrp and LineageOS on my op6 i just bought in used condition.
Data of the Phone:
OnePlus6 A6003
OxygenOS 9.0.2

Im following all the steps from:

Everything works fine untill its suposed to boot into twrp.img with the fastboot commands. It just Reboots to the OPscreen and then into the qualcom crashdump mode. It is no problem to exit this mode and retry everything but there are no changes.
I tried several twrp versions and been searching for different ways and tutorials but couldn´t find help yet.

Hope to find some here
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