Time wait bucket overflow

I have an Asus RT-AC3200 as my main router, 2 switches, and a Netgear EX7000 setup as an AP on one of my switches. This morning I noticed my internet connection being really slow, and when I checked my syslog, all I see if this:
Jan 12 11:07:10 kernel: TCP: time wait bucket table overflow
Jan 12 11:07:10 kernel: TCP: time wait bucket table overflow
Jan 12 11:07:10 kernel: TCP: time wait bucket table overflow
Jan 12 11:07:11 kernel: TCP: time wait bucket table overflow
Jan 12 11:07:11 kernel:...

Time wait bucket overflow