Welder not recognized light armor block from face of cube

This is an interesting bug. I am currently welding up a new large station in the Oblivara sector.

Since I am not sure if this issue is due to the scale of the construction or something peculiar with how the blocks were placed, I am going to start by describing the station construction.

I started by creating a surface platform and installing a pair of batteries and an antennae to make the base easier to find. From there I added a strip of conveyor nodes with conveyors to hook up the manufacturing blocks - smelter, assembler, refinery and foundry - so I could make parts. (I prefer construction by parts versus direct from ores.) I also added 4 large (7.5m) storage containers under the conveyor nodes and cross-connected them with each other and the conveyor node strip using conveyors so they would all be recognized. I added 15 large batteries below the platform for power storage. I also added a large hydrogen tank to the station for future hydrogen storage. There is also a long conveyor tube with a connector for ship docking.

I then used half light armor cubes to add walls to which I connected a set of solar panels for generating power.

To hide the containers and tank and make the base look more polished, I added a large area of full light armor cubes (2.5m) to enclose the bottom. There is also a door to allow access to the interior and a docking tube that is exposed externally to allow my ships to dock.

One issue that I ran into early is that welding from the inside was problematic. The welder kept flickering in and out of contact for welding and wouldn't stabilize. I eventually moved outside get to a surface that allowed stable contact for welding.

When I was nearly completed with the welding, I ran into six full light armor cubes that refused to be recognized externally. In screenshot 133754, you can see the welder on the external side showing the light armor cube being recognized next to one of the blocks that refused to be recognized. Screenshot 144826 shows one of the light armor cubes not being recognized by the welder at all, no matter how close that I was to the block. Screenshot 135133 shows the 6 blocks that were being a problem - the sun is setting, so it is difficult to see the sixth block. Oddly enough, these appear to be 5 blocks apart and 3 blocks in from each edge, all of which welded up fine around it but some of the blocks are no longer being recognized by the welder or grinder.

However, if I move to the inside of the structure, you can see in screenshot 133937 that these same blocks are recognized by the welder. I was also able to complete welding these 6 blocks just fine from the inside of the structure.

Screenshots 140620 through 140940 show views of the station construction so far both from the outside surfaces and the inside storage areas, including how the containers are connected at the back to the conveyor node strip.