If you've disabled the splash screen option in Opera GX settings but still encounter it, you can try the following steps:
Check for Updates: Make sure your Opera GX browser is up to date. Sometimes, updates can address such issues.
Clear Cache and Cookies: Clearing your browser's cache and cookies can resolve various issues. Go to Opera GX settings, find the "Privacy & Security" section, and then select "Clear browsing data." Choose the time range and select "Clear data."
Extensions: Some browser extensions may interfere with settings. Try disabling or temporarily removing extensions to see if that resolves the issue.
Reset Opera Settings: If the problem persists, you can reset your Opera GX settings. Go to Opera GX settings, navigate to "Advanced," and then select "Restore settings to their original defaults."
Reinstall Opera GX: If none of the above steps work, consider uninstalling and reinstalling Opera GX. Make sure to back up your bookmarks and important data before doing so.
After trying these steps, restart Opera GX, and the splash screen issue should hopefully be resolved.