Ping is higher now for PSO2, it used to be stable around 100 ms but few days ago I noticed it is around 200-250 ms and fluctuating up to 3000 ms.
In mudfish, 3000 ms ping means there’s a packet loss between mudfish node and your desktop. Please check How to check the basic functionality first whether it’s okay.
You can try to choose a mudfish node based on FAQ - Nodes.