Did you take the flat pressed resin and make a ball in between the 4 presses? You must have not and the first time you touched the resin after press it just did not hold together. This show that the amount of resin formed in the resin head is not enough to hold its mass.
You don't need to work in sub zero conditions for the resin heads to fall, they are made by nature to fall at the slightest touch, like a fruit actually.
Check the following research http://www.hempreport.com/issues/17/malbody17.html
Nonetheless despite having their machine custom made Boldtbags is in the same position than the companies adding a sticker, the Chinese are saling the same model at a lower price with a lower quality/capacity motor but most people don't care.
I still prefer to use boiled water, the lower temp are better in my eyes, decarboxylation is a delicate operation. I refill my bottle after every press or 10-15 minutes