When using flint and steel directly on blocks that can be replaced by blocks normally, the fire is placed either beside or on top of the replaceable block, instead of replacing it like with other blocks.

This issue is different from MC-169393, as it concerns the replacement of said blocks via targeting adjacent blocks, as opposed to by direct targeting. This ticket is closer to MC-130761, since this issue also affects buckets whereas buckets can replace blocks via indirect targeting.