If you're experiencing issues with input fields in your APEX application, this is a Google Chrome bug that was introduced by a recent Chrome update.
It is not an Oracle APEX issue, so please try this quick workaround by @tim-kimberl-oracle to your CSS:
.apex-item-select,
.apex-item-text,
.apex-item-textarea,
.apex-item-multi {
backface-visibility: hidden;
}
You can add this CSS code to Custom CSS. When running the app, navigate to Developer Toolbar: Customize -> Theme Roller.
Update: Using the latest version of Google Chrome (Version 98.0.4758.102) this issue is not reproducible anymore
Please comment if you're still facing the issue, thanks.