Future MC is interfering with Flint and Steel dispenser behavior, such as igniting blocks in front of it. A specific case of this is EnderIO's infinity dust automation, which requires using flint and steel in a dispenser to light fires on bedrock.

The issue occurs in all Future MC versions 0.2.18 and up.

Did a bit of digging and found that it is this class overwriting vanilla dispenser behavior for the Flint and Steel. Instead of returning the basic stack, it needs to either include a dispenser logic fallback pulled from the registries or it needs to return the DEFAULT behavior.

See: Inspirations Dispenser Logic