Lava cauldron is not spreading fire on flammable blocks

Can confirm.

why should this be a bug? instead of an intended feature.
have lava cauldrons spread fire before? any reference from bedrock edition?

the way I see it, cauldrons contain the lava and stop it from spreading fire. the heat is so well contained that, in bedrock edition, even mobs that are fire resistant can take damage inside the cauldron.

Lava cauldrons don't spread fire in Bedrock.