Many clients come to Kinsta for exactly this problem they’re facing at other WordPress hosts. Since most WordPress sites are hosted on Nginx or Apache webservers, it means that Nginx or Apache is waiting for a response from something and timing out. Most internet protocols can correct for some packet loss, so you really shouldn't expect to see a lot of impact from packet loss until that loss starts to approach 5% and higher.
Anything over 2% packet loss over a period of time is a strong indicator of problems.
