OMG, I found the issue, is about how the decimals are codified in the upgrades. In Spain we use the comma(,) to separate the decimals, and it's what I'm using, but with the English language the standard separator is the dot(.). Tomorrow I will update the code to solve these things.
When are you buying the upgrade? Can you reproduce the bug any other time? What is the upgrade you are buying? The cooldown reduction of the second upgrade is very small, maybe you are not waiting that long?
Hi, thanks for report this. I can't reproduce the bug, and I didn't find anything that can cause it in the code. If you have more information, please let me know :)
