Backspace on empty block before indented block delete both blocks #1593

Describe the bug
Backspace on empty block before indented block delete both blocks

To Reproduce

1. Press enter multiple times.
2. Indent one block and write something.
3. Go to the block before the indented one and write any char.
4. Press backspace two times two delete the block. It will delete also the indented one.

Misc

• Browser: Chrome
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