Flutter App Shows Grey Screen in APK Build, Works Fine on Emulator (After Update)

I’m encountering a strange issue with my Flutter app that has me stumped. Here’s the situation:

• The app works perfectly fine in the emulator (both debug and release modes).
• When I build the APK or test on iOS through TestFlight, some screens are completely grey.

What I’ve Tried:

I searched Stack Overflow and tried several suggestions:

• Removed Expanded widgets that might cause layout issues.
• Cleared app cache and reinstalled with new build after performing flutter clean.
• Verified that there are no errors in the logs using flutter build apk --release -v.
• Commanded out parts of the code, and re-enabled them line by line to isolate the issue.

Finally, I traced the issue to hard-coded data in the controller section of my app. When I removed the variables and directly passed the data (e.g., instead of using a variable to store the data), the grey screen issue disappeared in the APK build.

Important Points:

• No errors in the verbose logs.
• The same code works perfectly fine on the emulator but produces grey screens in the APK build.
• This issue only surfaced after I updated Flutter to the latest version.

Has anyone else experienced a similar issue, especially after a Flutter update? Is there something I should be aware of in the way hard-coded data is handled in production builds, compared to how it’s processed in the emulator?

Any help would be greatly appreciated!