[PATCH 0/5]: soreuseport: Bind multiple sockets to the same port

I'm not quite understand the issue with 3WHS and SO_REUSEPORT.
How is that possible for subsequent ACK to not match the same port even if any of listening sockets were closed (or added)?
Do you mean, that connection may be lost despite the fact, that there are other listening sockets exist on reused port?
And how newly added listening sockets on the same port can affect this?