Hi there MarcoLoco,
I’m not sure what diagnostics were provided previously, but the IP from your original post looks to be from BT and if that’s the specific node you’re having problems with, you’ll probably want to contact them directly and let them know.
As for what you can try on your end for now, you can find more info and resources in the sticky over here: Common Connection and Latency Issues.
There you can also find details on further diagnostics to run. If you don’t want to post the results publicly, you can also contact us directly here and attach the requested files to your ticket.