This is a new bug since the latest update. When you open the forge and also every time you combine materials the entire game locks up for about 8 seconds. Once it comes back you can claim your combined materials. This happens everytime you try to combine materials and is very frustrating. 

I second both of the above. It is a nightmare to combine materials!

I'm having the same problem, and it started right after the last upgrade, the whole game freezes whenever you try to do anything in the forge, can take 15-30 secs before the game becomes active again,, I.G.N. ,,CruiseCtrl,,,Kingdom #775

Plarium please fix this issue. This is very annoying. It is now kicking me out of the game and I have to restart sometimes when trying to combine materials in the forge.

Welllll, I was hoping the maint they were doing, for hours, was to fix the forge issue, but I guess not, it's still broken :(

Forge still playing up for me. Using Firefox. Clearing memory before starting does not help. Works slightly faster using list of items than using tile view.

Hope it gets fixed when the Send Gift button is activated (but prefer before then).

Forge not working from March 13th.. so 13 days now. 3 maintanances since then and what did you do? Nothing.