fix: correctly handle missing and zero values

Author: justandras

packages/job-worker/src/playout/lookahead/findForLayer.ts

@@ -115,7 +115,7 @@ function generatePartInstanceLookaheads(
 ): { objs: LookaheadTimelineObject[]; partInfo: PartAndPieces } {
 	const partInfo: PartAndPieces = {
 		part: partInstanceInfo.part.part,
-		usesInTransition: partInstanceInfo.calculatedTimings?.inTransitionStart ? true : false,
+		usesInTransition: partInstanceInfo.calculatedTimings?.inTransitionStart !== null ? true : false,
 		pieces: sortPieceInstancesByStart(partInstanceInfo.allPieces, partInstanceInfo.nowInPart),
 	}
 	if (nextTimeOffset) {

packages/job-worker/src/playout/lookahead/findObjects.ts

@@ -152,7 +152,7 @@ export function findLookaheadObjectsForPart(
 
 		const res: Array<LookaheadTimelineObject> = []
 		allObjs.map((obj) => {
-			const piece = partInfo.pieces.find((piece) => unprotectString(piece._id) === obj.pieceInstanceId)
+			const piece = partInfo.pieces.find((piece) => unprotectString(piece._id) === getBestPieceInstanceId(piece))
 			if (!piece) return
 
 			// If there is a transition and this piece is abs0, it is assumed to be the primary piece and so does not need lookahead