We have finally finished all maintenance! Our server hardware has been upgraded to better cpu/ram/ssds, along with major internal software upgrades. We're still tweaking configs so pardon any issues. Thanks!
I reacently found this tool, which is just a workaround, but not bad if you have a library of tiff images with alpha chanel.
unfortunately it doesn´t work with batch render(
h t t p :// w w w .avizstudio.com/tools/a2dimage/