Another issue regarding disappearing blocks!
I was covering my Mekanism wires (Universal Cable) with Chisels & Bits (11.10), and when using more than 1-2 types, the entire block would go invisible. Still functional, but invisible.
I thought at first it was because of rapid bit placement, but discovered after that it's because of multiple bit types. Seems to be the case once I reach the middle of the cable.

Also an issue with Refined Storage cables, although not as frequent, or bad (the cable itself will remain visible)

I currently have no way to see the block, or break it without the usage of TNT, which did inflict quite a bit of damage on the building itself.

Video: https://www.youtube.com/watch?v=Cqzyv9ViZZk

Try https://dvs1.progwml6.com/jenkins/job/Chisels-and-Bits/lastSuccessfulBuild/artifact/build/libs/chiselsandbits-12.0.16.jar

I know there are some changes I've already made I don't know if its the same issue, I was playing around with refined storage cables and mekanism wires during the tests however, and I don't remember them disappearing in the latest build, but I might be wrong.

So I tried 12.0.16, and I could not replicate the block disappearing completely, which is great news.
It did on occasion when placing Planes fast, leave half-completed planes, as shown in the picture below, but that is very minor and can be worked around with by simply placing a plane again.

I will have to wait for it to be up on Curse though.

yeah, I'm not entirely sure what the deal is with the MCMP collision code producing that irregular pattern of bad data.

It never used to do that.

I've added an issue so I remember about it over here, #132

And 12.1 should be available on curse soon.