I selected the option hide full header for server signature and it doesn't appear to work, it still shows "LiteSpeed". I noticed I got the warn error: [config:server:basic] invalid value of <showVersionNumber>:2, use default=0
Just to update that the header disappeared a few days ago on its own. I had already tested on multiple browsers and cleared the cache previously so I don't think that was it. It might have cleared from a server reboot or something, even though one of them only required a restart of lsws. No problems now then.