What did you do?
I used the rail planner and mined the rails from which the rail planner starts

What happened?
The rail planner remained open, starting from inexistent rail

What did you expect to happen instead?
The rail planner would close or return to the previous rail

In 0.17 they removed the armor durability. Could you remove the durability from the mod?

A quick fix for your mod to work with 0.17.x
https://mods.factorio.com/mod/OreCompressFix