First off, I love the idea of this mod. I'm using the redeployment chests in an automated construction train station of mine that will automatically order construction supplies (and bots) from my mall. For the bots, it will also automatically insert them into the network when available bot counts are low. Your mod ensures I can do that because using a roboport would fail if there was no more space in that roboport.
Now to the bug, these chests are missing a vital flag that allows them to be used in blueprints. From the wiki, using a placeable and player-creation flag corrects this.
I did a quick edit in my own mod data-final-fixes as such:
data.raw["logistic-container"]["robot-redistribute-chest"].flags = {"placeable-player", "player-creation"}
and it works great. Could you please consider updating yours as well?
Cheers!