Table broken while pasting multiple blocks into its cell

[Karl-Wu]

Describe the bug Copy content with multiple blocks, heading and paragraph e.g., into clipboard, then paste it into a table cell. The table will broken into 2 table.

To Reproduce

1. Create a table
2. Copy content with two blocks, then paste it into any cell in table. code example

Misc

• Node version:
• Package manager:
• Browser:
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