linuxcncrsh set spindle_override 75 is it bug?

I have last version LinuxCNC 2.9.2. I add in my hall file it string - loadusr linuxcncrsh --port 5007 --connectpw pw --enablepw pw
and when I connect to linuxcncrsh by telnet I get lost connection after I send set spindle_override 75
it my log:
hello pw k1 1.1
HELLO ACK EMCNETSVR 1.1
set enable pw
set echo off
set estop off
set machine on
set spindle_override 75
    
[ ALERT ] - Socket got disconnected.
            Reason: The remote host closed the connection
[ INFO ]  - Connection time: 00:38:58.831
                
[ INFO ]  - Looking up the IP address of server: 192.168.2.3:5007 ...
[ INFO ]  - The IP address of 192.168.2.3 has been found. It is: 192.168.2.3
[ INFO ]  - Trying to connect to 192.168.2.3:5007 ...

And I must close axis and rerun it to obtain connect.
May be somebody can repeat my test and give me some advice?

Yes, I tried other values of override - 25; 50; 100; 1; 0.5; 0.75 - and no luck
today I try send simple "get spindle" without any arguments and get same lost connection.
here it log:


and other try with another value of override: