I am running Alpha 19.1 (b8).
Two very weird physics effects happened in my latest game. I was cutting the electrical cabling on the mega broadcast tower POI. It was definitely the cabling because I was cutting through 300 point material instead of the towers 1000 metal.
When it cut out a single section of of the cabling running up the tower, the entire tower above it collapsed around me. I squatted down and managed not to die with a full third of the tower collapsing around me.
Then half an hour later, same game and I am standing on scaffolding in a POI, zero damage to the scaffolding or anything around it. I dig up one stack of concrete. As soon as the concrete hits my inventory, the entire scaffolding structure collapses. I didn't survive that one.
Is this just me? I have screwed up when constructing and deconstructing buildings in 7DTD for a long time, have watched the Structural Integrity video on YouTube (good stuff), and I know what happens when I frack up and chop out a key support.
I was willing to write the first one off as my being an unobservant dumbass and actually cutting out the metal by mistake instead of the electrical cabling.
But I have never collapsed anything after I dug out a materials block.