Timings issue with 1.13.2 Server


Hello dear viewers, so I have this question regarding server Tick that I experience on my 1.13.2 server.
We just recently updated the server into 1.13.2 but the Tick that we experienced keep dropping even when there’s less player playing. Here’s the Timings Report that I can provide:

Timings #1:
Tmings #2:

I’ve tried using PandaWire and the other plugins that can reduce the latency but it seems like I’m missing something. So if there’s any solution or suggestion that can reduce the TPS drop, then it would be really helpful for me and the players. Again thank you for reading and giving me respond