Perhaps BH209 wasn't available in Spain and the company was in a rush to finalize their design and get production rolling.

IMHO, there's nothing "wrong" with manufacturing a powder that doesn't reliably ignite with every breech plug, or, a company that designs rifles that don't work with all available components.

The important thing is that the respective manufacturer does list components or breech plugs that have have proven safe and reliable so folks can make intelligent purchasing decisions.

After all, there are lots of cartridges, i.e 6mm Remington and .243 Win that offer identical performance without interchangeability. No one had their knickers in a twist when they couldn't get a Model 70 in 6mm Remington they just bought a Rem 700, or a Mod 70 in 243.

YMMV