Can someone explain the cause of this? Server just literally freezes, making it unplayable.

[Buzzlybee]

So, when I join any lobby, sometimes, the server just downright freezes and lags back SO MUCH. When this happens, my frames per second, or fps drops really low, and I don't really know what to do. I just recently started playing JartexNetwork's Bedwars, and this has been happening since.

Video:

View: https://youtu.be/gTZNrxfJiiw

 

[XstreamSpeed]

I use 1.8.9 and the lag is no different