Pasting multiline content into table cell breaks table structure

[expiante]

Pasting multiline content into a table cell results in the table being split and the content being inserted outside of the intended cell.

Expected Behavior

• Multiline pasted content should be inserted inside the currently selected table cell
• Line breaks should be preserved within the cell

Actual Behavior

• The table is split into two parts
• The pasted content is inserted outside the table, as if pasted at the document level

This behavior is unexpected and can easily break table layouts during normal editing.

[nperez0111]

This is definitely a bug on our side that we should resolve with some paste handling on our side. It would be added as part of the defaultPasteHandler implementation described here: https://www.blocknotejs.org/docs/reference/editor/paste-handling