Deleted IMP , came back

I had started some part of this question in some other thread, however why this was solved needs an answer.

So I deleted my IMP and tried to re-connect it.
Deleted the IMP in the planner that was.

I erased the connection on the hardware via blinkup etc. nothing worked.

Now I connected a different new impee and IMP to my account and it appeared as blank. After that was successfulm I connected the old ‘faulty’ imp to the network and voila, magically that one appeared as well.

Seemed like it needed one imp to have the other connect as well (similar to code bug?)

wonder if anyone can replicate this.