Bootloader unlocked but can not flash twrp recovery.img stuck in writing recovery

Bootloader unlocked but can not flash twrp recovery.img fastboot say Writing ‘recovery’ then nothing happend…

Device Model : Itel L6005
Processor : Unisoc SC9863a
Bootloader is unlocked, you can see attached image
I try to flash recovery with this command…

>fastboot flash recovery twrp-recovery.img 

the output is

Sending ‘recovery’ (23132 kb)           OKAY  [  1.029s]
Writing  ‘recovery’                              _       

and then nothing happend. I attached screenshoot you can see.
How to fix this problem.

Note :  My devices Ramdisk : NO     SAR : YES  That means I can not flash custom recovery with root access or magisk.
I need to flash custom recovery first for make root or other access…please help how to fix this problem.
Thanks in advanched.