Hi there! I understand that your screen keeps flashing back and forth when you try to download the Murphy Drive Rewards app from the App Store on your iPhone with iOS 18.5. Let's get this sorted out together.

To start, could you please confirm a couple of things for me?
- Are you able to browse other apps in the App Store without this flashing issue?
- Have you attempted to restart your iPhone since noticing this problem?
- Is your iPhone storage space sufficient to download new apps? Sometimes low space can cause glitches.

While I wait for your answers, here are some initial steps that often help with app download display issues:

1. Restart Your iPhone
- Press and hold the side button and either volume button until you see “slide to power off.” Slide to turn off.
- After the device is off, press and hold the side button until the Apple logo appears.

2. Check for iOS Updates
- Go to Settings > General > Software Update and make sure you have the latest iOS version installed. Although you mentioned iOS 18.5, sometimes minor patches can be pending.

3. Clear App Store Cache
- Open the App Store app.
- Tap any of the bottom menu icons (like Today, Games, Apps) 10 times rapidly. This clears the cache and can resolve flickering or freezing bugs.

4. Check Network Connection
- Make sure you have a stable Wi-Fi or cellular connection.
- Try toggling Wi-Fi off and on via Settings > Wi-Fi.

5. Free Up Storage
- Confirm you have at least a few hundred MB free by going to Settings > General > iPhone Storage.

If the flashing continues after these steps, there may be a deeper rendering issue with the App Store or the app’s page on your device. In that case, a reset of network settings or signing out and back in to your Apple ID on the App Store may help:

- Reset Network Settings:
Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings (Note: this deletes saved Wi-Fi passwords).

- Sign out from App Store:
Settings > [Your Name] > Media & Purchases > Sign Out, then sign back in.

Let me know which steps you’ve tried or how it's going after these. I’m here to assist you every step of the way!