Mobile Screen Jumping

I have a form that generates approximately 500-600 submissions per day. The form currently contains 320 fields, 55 form rules, 100 lookup fields, and around 80 image fields.

I've been troubleshooting a significant issue on mobile devices where selecting any multiple-choice question causes the screen to jump erratically. To isolate the problem, I've tried:

• Removing all image fields
• Reducing the total field count
• Creating a simplified version with only 5-6 questions and roughly 30 fields

Even with the stripped-down version, the screen jumping still occurs whenever a multiple-choice field is selected on mobile.

Has anyone experienced something similar or have suggestions on what might be causing this? I'm trying to determine whether this is related to form configuration, form rules, lookup fields, browser behavior, device-specific issues, or a platform limitation/bug. Any troubleshooting ideas would be greatly appreciated.