I swapped over to the public test server and seems that if I am looking too closely at another item I'm not able to place or cancel a blueprint which makes placing anything on a wall or floor, unless you can get the angle right, impossible. Also if I get go into a zipline anchor to connect to another anchor and it's blocked I can't back out of that either as I believe it counts as me looking at said structure. Has anyone else experienced this or is it possibly something on my end?

I'm going through the same thing when it comes to placing anything. Its impossible to place a bug head mount because you have to be close to do it.

From the looks of it you can only place the item when the words Recycle and Supporting are not appearing. When its visible its hard to place cause it thinks you're trying to recycle something so its like the two are conflicting with one another in a way. You have to get in a weird angle which is almost impossible to where those words don't appear for you to place an item on a wall or floor. I manage to place one head mount on a wall but I'm having  a hard time doing the other.

I haven't tried the head mounts but the zip line wall anchor is impossible. Wish I could find a work around to get it to work.