Building is annoying me

In creative mode, I’m building a large ship cargo transport.

I’ve put 3 or 4 cargo containers, link them via conveyors with collectors on top. While building the lower section where there will be connectors, I accidentally right click and delete a cargo container. No problem, I’ll just put it back… except the game refuses to allow me to install a cargo container where the original one was. I’ve rebuilt several times in different configurations, but the same damned thing happens every time (and you think I would stop accidentally right clicking, but noooo).

This must be a bug introduced with the conveyors.