Inconsistent block breaking speed

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