what's the meaning of the gray blocks below "time expended"

[eyemooneye]

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can anyone help explain the meaning of the gray blocks below "time expended"?
I have feeling it has something to do with the timestamp that has already been expended by other combat plan, but...
but why in other combat plans in the same round, sometimes "time expended" show 2 gray blocks plus 1 golden block, and sometimes "time expended" shows all 3 gray blocks?
is there any particular meaning behind it?
thanks in advance.

[altipueri]

RTFM page 99

[eyemooneye]

Anonymous Heroics (Red PO) 3 - bug report for time expended.zip

(1.06 MiB) Downloaded 3 times

I believe it's bug. I attach it to the post for designer of the game, which is a great game, to improve in next release.

regards,

[Curtis Lemay]

Anonymous Heroics (Red PO) 3 - bug report for time expended.zip

I believe it's bug. I attach it to the post for designer of the game, which is a great game, to improve in next release.

regards,

Again, read the manual on page 99: