Buildcraft version: 7.99.6
Steps to reproduce:

yeah the table if checking if it has more power then needed in it's buffer, if it has exactly enough it refuses to craft, fixed on my fork for 1.12, will cherry pick to 1.11.2 later
Is there any fix or do we have to wait for an update?
an ingame fix is not possible sadly, the root cause was an internal change that means the assembly table can no longer receive more MJ then it needs to finish it's current crafting operation so a we need to release a new version
a fix was implemented on my 1.12 branch but i'm currently the only available BC dev, the others are out of town so we are not in a position right now to do a new release, once the others return i will backport this fix and others for a release
It is possible to apply patch https://github.com/AEnterprise/BuildCraft/commit/7cb2c5161d8ff6bb00dc975a76112f4e948b287e on 1.11.2
yes as i said in my previous comment on this issue: i will apply this one and other fixes i made while working on 1.12 to 1.11.2 later, all at once when we do a new release