Bugs are always possible But recognizing 0 cells sounds strange if you did have network coverage. Under the hood cell condition is using org.ofono interface to read and get notified of cell changes. It should be quite solid, but who knows...

Yes, the current network cell features & UI in Situations is quite limited. It's mainly designed for ease of implementation and use, and more advanced features have been on the backlog already for quite some time. Hopefully I get some time to implement them at some point.