Realized I was running low on flour after upgrading some stuff so applied some buffs throughout the production chain when I noticed this oddity.
I put a harvest ritual buff on my silos, but then I noticed that my Improved Silos started showing the "missing raw materials" icon and if I click on the details the production timer is also stopped. The regular silos don't have this issue.
I'm guessing it's a display issue only the production overview still show +4K from buffs at least, but I haven't done the math on my income to verify that 100%. Logging out and back in didn't change anything.
[Edit:] Well dang, no sooner had I posted this the display went back to normal again, lasted for a good 5 minutes at least I would say, logged out and back in and it was still happening, but after posting this and going back to the game it was all back to normal, so feel a bit silly, but something strange happened there.