diff --git a/src/services/blocks/BlocksService.spec.ts b/src/services/blocks/BlocksService.spec.ts
index 2d4f414c8..90a05cfbb 100644
--- a/src/services/blocks/BlocksService.spec.ts
+++ b/src/services/blocks/BlocksService.spec.ts
@@ -149,7 +149,7 @@ describe('BlocksService', () => {
 		});
 
 		it('throws when an extrinsic is undefined', async () => {
-			// Create a block with undefined as the first extrinisic and the last extrinsic removed
+			// Create a block with undefined as the first extrinsic and the last extrinsic removed
 			const mockBlock789629BadExt = polkadotRegistry.createType('Block', block789629);
 
 			mockBlock789629BadExt.extrinsics.pop();
@@ -377,7 +377,7 @@ describe('BlocksService', () => {
 			paraId: undefined,
 		};
 
-		it('Returns the correct extrinisics object for block 789629', async () => {
+		it('Returns the correct extrinsics object for block 789629', async () => {
 			const block = await blocksService.fetchBlock(blockHash789629, mockHistoricApi, options);
 
 			/**
diff --git a/src/services/blocks/BlocksService.ts b/src/services/blocks/BlocksService.ts
index b37258365..df4c06481 100644
--- a/src/services/blocks/BlocksService.ts
+++ b/src/services/blocks/BlocksService.ts
@@ -438,7 +438,7 @@ export class BlocksService extends AbstractService {
 
 	/**
 	 * Retrieve the blockHash for the previous block to the one getting queried.
-	 * If the block is the geneisis hash it will return the same blockHash.
+	 * If the block is the genesis hash it will return the same blockHash.
 	 *
 	 * @param blockNumber The blockId being queried
 	 */
@@ -590,7 +590,7 @@ export class BlocksService extends AbstractService {
 					const extrinsicIdx = phase.asApplyExtrinsic.toNumber();
 					const extrinsic = extrinsics[extrinsicIdx];
 
-					if (!extrinsic) {
+					if (!extrinsic && event.section != 'multiBlockMigrations') {
 						throw new Error(`Missing extrinsic ${extrinsicIdx} in block ${hash.toString()}`);
 					}
 
@@ -610,7 +610,9 @@ export class BlocksService extends AbstractService {
 						}
 					}
 
-					extrinsic.events.push(sanitizedEvent);
+					if (extrinsic) {
+						extrinsic.events.push(sanitizedEvent);
+					}
 				} else if (phase.isFinalization) {
 					onFinalize.events.push(sanitizedEvent);
 				} else if (phase.isInitialization) {
@@ -789,7 +791,7 @@ export class BlocksService extends AbstractService {
 	}
 
 	/**
-	 * Fetch a block with raw extrinics values.
+	 * Fetch a block with raw extrinsics values.
 	 *
 	 * @param hash `BlockHash` of the block to fetch.
 	 */