I was killing wither skeletons with Smite V and Strength II diamond sword. I saw that I had 13 kills. I killed a wither skeleton and checked my stats: still 13. Then I killed another: now 15.
- Spawn in a bunch of wither skeletons.
- Get a Smite V diamond sword (netherite probably works, too)
- Apply Strength II
- Kill the wither skeletons and count how many you have killed
- Check your stats.
- Repeat 4 and 5 until you notice a discrepancy.
MC-55775 Statistics screen sometimes doesn't show up to date information