If you break blocks with certain efficiency levels, the mining speed of the same type of block can sometimes be very inconsistent. This can be seen by chopping down a 2 by 2 wide tree (jungle, dark oak) with an efficiency 4 diamond / netherite axe.
It also happens with other tools that mine certain blocks at the same speed than a diamond / netherite axe mines wood.

Expected behaviour:
While chopping down a 2 by 2 tree, every log should break at the same speed.

Actual behaviour:
Sometimes if you jump while breaking the logs makes it break way too fast. (Tested with efficiency 4 on a diamond and netherite axe)

Video: https://www.youtube.com/watch?v=YIT8zhEiI3E