Actions Performed Achievement not incrementing for actions under 3 seconds

[Muse 2,232]

I am using an 89.95ql rare chisel with WoA 75 on some unidentified archaeology fragments to clean them.

 

I am able to queue 6 items - so I can use the chisel on a stack of 7 fragments before stopping.

 

I have a fast chisel and so the first action in the queue is always 2.9 seconds.

 

This first action does not increment the 'Actions Performed' achievement in the Achievements window.

 

For example I process a stack of 7 fragments all successfully but the Achievements window only registers 6 more actions on the 'Actions Performed' Achievement.