I started a batch of blocks at about 11 am EST, and while I realize that machines are taking longer now, it's almost 12:00 pm EST. I'm pretty sure that 20 blocks shouldn't take _this_ long. Anyway this can be looked into please?
I'm having the same issue with my fuel maker. It was taking several minutes to finish making a few fuel cells, and this last batch has been running for over half an hour! Reloading has not helped. My other machines are finishing after the (new) regular amount of time.
I'd suggest filing bug reports either in game or by clicking "Help" on the web page for these -- that will make it easier for staff to send a repair technician. =)