See attached screenshots. Sometimes, sharp edges run continue for more than what would be considered normal.

Example:

• Seed: 4443456532649347071
• Coordinates: /tp @p 68 73 74

Noteworthy: This edge runs right along the middle of the chunks, 8 blocks being filled with endstone and 8 blocks being filled with air.

More examples:

• Seed 3239279967284580547
• /tp @p 11 72 18825
• /tp @p -458 65 15252
• /tp @p -278 60 1509
• /tp @p -279 36 1466
• /tp @p 190 71 1344