LTB is still active for 1:48 why is the +1 gone?

[& The Horse U Rode In On]

Title says it all. Isn't the +1 tied to the LTB? Why when WD ends and the cycle ends does the +1 also end?

[crazeejay]

You should've made sure to get that +1 building upgrading before WD ended. I know I did..lol

[Web323]

Always goes after the end of the WD