Ssh session got disconnected when using backspace to delete character with ConfD 8.0.8

We recently upgrade from ConfD 7.2.2 to ConfD 8.0.8 and start to see this issue. In serial console when using ssh to connect to ConfD if we use backspace to delete any character it’ll disconnect to ssh session. With ConfD 7.2.2 we do not see this issue. This issue is also not seen when ssh into ConfD from outside. Below is the log from “ssh -vvv” and how the serial console terminal is established. Has anyone seen issue like this or have any idea how to debug?

nfvis# aaadebug3: receive packet: type 98
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug3: receive packet: type 97
debug2: channel 0: rcvd close
debug2: channel 0: output open → drain
debug2: channel 0: chan_shutdown_read (i0 o1 sock -1 wfd 4 efd 6 [write])
debug2: channel 0: input open → closed
debug3: channel 0: will not send data after close
debug2: channel 0: obuf empty
debug2: channel 0: chan_shutdown_write (i3 o1 sock -1 wfd 5 efd 6 [write])
debug2: channel 0: output drain → closed
debug2: channel 0: almost dead
debug2: channel 0: gc: notify user
debug2: channel 0: gc: user detached
debug2: channel 0: send close
debug3: send packet: type 97
debug2: channel 0: is dead
debug2: channel 0: garbage collecting
debug1: channel 0: free: client-session, nchannels 1
debug3: channel 0: status: The following connections are open:
#0 client-session (t4 r0 i3/0 o3/0 e[write]/0 fd -1/-1/6 sock -1 cc -1)

debug3: send packet: type 1
debug3: fd 1 is not O_NONBLOCK
Connection to localhost closed.
Transferred: sent 2328, received 3064 bytes, in 10.3 seconds
Bytes per second: sent 225.4, received 296.7
debug1: Exit status 0
[root@nfvis ~]#

====serial console connection setup====
serial consol uses agetty on Linux to establish the terminal. The ssh disconnect issue is only seen with the terminal created by agetty.