Merge commit a6c637ae (conflicts)

node/service/src/lib.rs

@@ -878,6 +878,7 @@ pub fn new_full<RuntimeApi, Executor>(
 			backoff_authoring_blocks,
 			babe_link,
 			can_author_with,
+			block_proposal_slot_portion: babe::SlotProportion::new(2f32 / 3f32),
 			telemetry: telemetry.as_ref().map(|x| x.handle()),
 		};