Why does the negotiation with the network fail? The only common issue I found is the voltage gets a "load" which drops the pulse peak for a short time.

Here negotiation fails:
[![No transsition occurs](https://i.stack.imgur.com/dzA7M.png)](https://i.stack.imgur.com/dzA7M.png)

Here negotiation is ok:
[![Propper transsition](https://i.stack.imgur.com/KZhic.png)](https://i.stack.imgur.com/KZhic.png)