Yellow HYD lo pressure

[Diegoamd]

Hi all.
This evening I tried a flight from EDDF to LIMC with A300-600F (PW DHL).
Started with cold and dark, checked the maintenace page with all parameters ok (hyd fluids are above 90%).

Imported flighplan from Simbrief, configured FMC (route and WB), start APU, pushback.
Started engines without problem, but HYD YELLOW remain in lo press (no brakes available, and cannot activate both switches of pitch trim and yaw dumper).

So I stop the engines, did maintenace (refill HYD fluids) and restart the engines again. Same situation.

Maybe a bug?
I saw that it's was an old BUG of the earlier version of the plane for MSFS2020.