[Bug] Heading level specific padding stops cursor

[alterhuman]

Bug Description

Adding a different padding for each heading level stops the cursor from moving up using the arrow key when it is at a heading.

How to Reproduce

To reproduce, specify different padding for each heading level in the HeadingBlockComponentBuilder.

BlockComponentBuilder headingBlock(BuildContext context) {
  final baseHeadingStyle = TextStyle(
    letterSpacing: -1,
    fontWeight: FontWeight.w500,
    color: context.palette.primary,
  );

  return HeadingBlockComponentBuilder(
    configuration: BlockComponentConfiguration(
      padding: (node) {
        // No top padding for first line/paragraph
        if (node.previous == null) {
          return const EdgeInsets.only(top: 0, bottom: 8);
        }

        switch (node.attributes[HeadingBlockKeys.level]) {
          case 1:
            return const EdgeInsets.only(top: 20, bottom: 8);
          case 2:
            return const EdgeInsets.only(top: 17, bottom: 8);
          case 3:
            return const EdgeInsets.only(top: 14, bottom: 8);
          case 4:
            return const EdgeInsets.only(top: 11, bottom: 8);
          case 5:
            return const EdgeInsets.only(top: 8, bottom: 8);
          case 6:
            return const EdgeInsets.only(top: 5, bottom: 8);
          default:
            return const EdgeInsets.only(top: 5, bottom: 8);
        }
      },
    ),
    textStyleBuilder: (level) {
      switch (level) {
        case 1:
          return baseHeadingStyle.copyWith(fontSize: 22);
        case 2:
          return baseHeadingStyle.copyWith(fontSize: 19);
        case 3:
          return baseHeadingStyle.copyWith(fontSize: 17.7);
        case 4:
          return baseHeadingStyle.copyWith(fontSize: 16);
        case 5:
          return baseHeadingStyle.copyWith(fontSize: 14.5);
        case 6:
          return baseHeadingStyle.copyWith(fontSize: 13.8);
        default:
          return baseHeadingStyle.copyWith(fontSize: 13.8);
      }
    },
  );
}

Expected Behavior

The cursor should be able to move up using the arrow key.

Operating System

MacOS

AppFlowy Editor Version(s)

2.2.0

Screenshots

Unable to move my cursor to the 'Hi' line using the up arrow key.

Additional Context

It works fine if I return only a single padding.

[q200892907]

#589 should be a problem