When the command capsule of a rocket is reconstructed after deconstruction, the the rocket doesn't show up under the space scanner's options. Sometimes it takes a dozen cycles for rocket to appear under the space scanner. Reconstructing the space scanner fixes the problem but it's really annoying.
As demonstrated in the screenshot, I have two rocket(towers)s. But the only one of them shows under the space scanner.
**Reconstructing space scanners dont seem to fix the problem either. However reloading does.
Construct a rocket and then reconstruct the command capsule. Then check the space scanner.