The GB screen should be the same now in the live version as here on Beta. I've been seeing complaints about delays in the new GB screen compared to the old screen for a while now, and I knew where parts of those complaints come from, but your comment might help explain a second part, if I'm lucky.
First issue: Input is now blocked during the loading process
In the new GB screen, there's visual feedback about when you can spend your Forge Points - there's loading in-between each click of the button. There was also loading delay present in the old GB screen (and in earlier iterations of the new GB screen here on Beta), but there was no visual feedback. You could click pretty often, but it would only count some of your clicks. It would look like you could try spending Forge Points, but sometimes nothing would actually happen if the game wasn't finished loading your changes. We ended up blocking input during loading to avoid issues with the amount of visually available Forge Points fluctuating a bit during your contribution, which was confusing and also sometimes caused bugs.
I
think we started getting complaints about slowness of buttons in the new GB screen when we started blocking input during the loading process, but someone might be able to remember better than I. Now that I think about it some more, the loading
might now actually be slightly longer than it used to be. I'll double-check that. Anyway , it's not as much longer as it might appear - the "hidden" loading would regularly ignore your input without telling you about it.
The part which could potentially explain why it takes longer for you on Beta than on live:
Are you by any chance based in North America, and do you usually play on the US server? The US server is based in the US, and the Beta servers are in Europe. If yes, the extra distance between you and the server adds on extra loading time for things the game client needs to load from the servers. This would be particularly noticeable when you're doing such an action often, like contributing FPs.
If you're not, I guess there's a fairly good chance that we've broken something in the new GB screen in the last 2 weeks. But as I said before - the GB screen
should currently be pretty much the same code on Beta as on live.