The previous blocks (added in the middle) disappear after scrolling down

[yilanzheng]

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Description

If I insert a code block in the middle, for example, add a code block below an existing block, and if I scroll down or execute this block, it will disappear. If I scroll up, it reappears again. However, after I execute the block, even if I scroll up, I can only go to the output, no way to ever see the code block again or to modify the code.

Expected behavior

Context

• MacOS 14.6.1
• Safari Version 17.6 (19618.3.11.11.5)
• Jupyter Notebook 7.2.1

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