Invalid Keepalive

[TrevorMR]

When a 1.14.4 client connects to the TyphoonLimbo server it gets kicked for "Invalid Keepalive" but when client rejoins it lets them in (sometimes).
1.12.2: Doesn't Happen
Untested with other clients.

[airoons]

Can confirm with higher versions as well (1.15.2, for example)