diff --git a/apps/remix-ide/src/assets/js/loader.js b/apps/remix-ide/src/assets/js/loader.js
index 5e5bfb631f..98a39476f1 100644
--- a/apps/remix-ide/src/assets/js/loader.js
+++ b/apps/remix-ide/src/assets/js/loader.js
@@ -32,13 +32,6 @@ if (domains[window.location.hostname]) {
   })()
 }
 
-createScriptTag = function (url, type) {
-  var script = document.createElement('script');
-  script.src = url;
-  script.type = type;
-  document.getElementsByTagName('head')[0].appendChild(script);
-};
-
 function isElectron() {
   // Renderer process
   if (typeof window !== 'undefined' && typeof window.process === 'object' && window.process.type === 'renderer') {
@@ -63,11 +56,5 @@ fetch(versionUrl, { cache: "no-store" }).then(response => {
   response.text().then(function (data) {
     const version = JSON.parse(data);
     console.log(`Loading Remix ${version.version}`);
-    createScriptTag(`polyfills.${version.version}.${version.timestamp}.js`, 'module');
-    if (version.mode === 'development') {
-      createScriptTag(`vendor.${version.version}.${version.timestamp}.js`, 'module');
-      createScriptTag(`runtime.${version.version}.${version.timestamp}.js`, 'module');
-    }
-    createScriptTag(`main.${version.version}.${version.timestamp}.js`, 'text/javascript');
   });
 });
diff --git a/apps/remix-ide/src/remixEngine.js b/apps/remix-ide/src/remixEngine.js
index 64fd918227..3a0c905acd 100644
--- a/apps/remix-ide/src/remixEngine.js
+++ b/apps/remix-ide/src/remixEngine.js
@@ -19,6 +19,7 @@ export class RemixEngine extends Engine {
     if (name === 'sourcify') return { queueTimeout: 60000 * 4 }
     if (name === 'fetchAndCompile') return { queueTimeout: 60000 * 4 }
     if (name === 'walletconnect') return { queueTimeout: 60000 * 4 }
+    if (name === 'udapp') return { queueTimeout: 60000 * 4 }
     return { queueTimeout: 10000 }
   }
 
diff --git a/libs/remix-lib/src/execution/txRunnerVM.ts b/libs/remix-lib/src/execution/txRunnerVM.ts
index b654ba7944..ed3562f30e 100644
--- a/libs/remix-lib/src/execution/txRunnerVM.ts
+++ b/libs/remix-lib/src/execution/txRunnerVM.ts
@@ -1,6 +1,6 @@
 'use strict'
-import BN from 'bn.js'
 import { RunBlockResult, RunTxResult } from '@ethereumjs/vm'
+import { ConsensusType } from '@ethereumjs/common'
 import { Transaction, FeeMarketEIP1559Transaction } from '@ethereumjs/tx'
 import { Block } from '@ethereumjs/block'
 import { bufferToHex, Address } from '@ethereumjs/util'
@@ -106,13 +106,14 @@ export class TxRunnerVM {
 
       const coinbases = ['0x0e9281e9c6a0808672eaba6bd1220e144c9bb07a', '0x8945a1288dc78a6d8952a92c77aee6730b414778', '0x94d76e24f818426ae84aa404140e8d5f60e10e7e']
       const difficulties = [69762765929000, 70762765929000, 71762765929000]
-
+      const difficulty = this.commonContext.consensusType() === ConsensusType.ProofOfStake ? 0 : difficulties[self.blockNumber % difficulties.length]
+      
       const block = Block.fromBlockData({
         header: {
           timestamp: new Date().getTime() / 1000 | 0,
           number: self.blockNumber,
           coinbase: coinbases[self.blockNumber % coinbases.length],
-          difficulty: difficulties[self.blockNumber % difficulties.length],
+          difficulty,
           gasLimit,
           baseFeePerGas: EIP1559 ? '0x1' : undefined
         },
diff --git a/libs/remix-simulator/src/methods/transactions.ts b/libs/remix-simulator/src/methods/transactions.ts
index bca6d05124..e7fbe6c225 100644
--- a/libs/remix-simulator/src/methods/transactions.ts
+++ b/libs/remix-simulator/src/methods/transactions.ts
@@ -156,9 +156,9 @@ export class Transactions {
     payload.params[0].gas = 10000000 * 10
 
     this.vmContext.web3().flagNextAsDoNotRecordEvmSteps()
-    processTx(this.txRunnerInstance, payload, true, (error, value: VMexecutionResult) => {
-      const result: RunTxResult = value.result
+    processTx(this.txRunnerInstance, payload, true, (error, value: VMexecutionResult) => {      
       if (error) return cb(error)
+      const result: RunTxResult = value.result
       if ((result as any).receipt?.status === '0x0' || (result as any).receipt?.status === 0) {
         try {
           const msg = `0x${result.execResult.returnValue.toString('hex') || '0'}`