L2TP Bug?

RouterOS General
1
  1. Client and Server for an L2TP tunnel are both Mikrotik.
  2. Client will only establish an L2TP tunnel with the server(s) when the connect-to IP is the WAN IP address of the Server.
  3. It will not establish with any other IP on the server.
  4. Client will establish a PPTP tunnel with server to WAN IP address and any other IP address on the server.

Servers are x86 3.10; 3.22 and 3.28.
Clients range from 2.9.44 to 3.28