Putty tabs in Eve-ng (UNetLab)?

Question

PuTTY

the bottom line is that when you click on the router, constantly new Putty windows open. I'm used to the fact that in GNS3 and Packet tracer, when you click on the router, the previous window opens, which has already been opened and is in the tabs.
And here, when you click on the router, new windows open.
Red marked the Putti tabs of the same router