Can't enter recovery mode ufter update

[NobTetsujin]

Hi, after update to OTA 10.3.4 i've lost recovery. I've tried to flash it with the All in One Tool, only to get stuck. I've recovered it flashing a stock ROM (wiping all my data in the process), but I can't flash or boot in recovery. I've tried fastboot flash recovery twrp-3.3.1-18-enchilada-Pie-mauronofrio.img and many other recoveries, but although the proccess ends OK it never enter recovery, no matter how many times I try. Any help would be appreciated.