dashiichi: Yes, very much so after installing the Sentinel update (3.80). It was quite annoying.
There is a 3.81 patch available on GoG this morning which seems (so far) to have corrected the frequent crashes in settlements. I may finally be able to get the landing pad built! ;-)
Cat713: ...Sadly the patch doesnt seems to solve the problem for me...
I've had a couple of crashes as well since installing the patch, so apparantly it's not actually fixed.
Both times the freeze has occurred a few moments after starting a new construction project, so that might be what is triggering the problem. Resource or memory allocation fault, maybe?
In the meantime, I guess my settlement will have to do without a new tower.