See this comment. I guess there could be similar problems with other lsp features, but I haven't checked.

When multiple language servers are configured for a file, using :lsp-workspace-command will only show the commands for one of the servers. Also looking at the code, I think that using :lsp-workspace-command <command> might also fail if multiple language servers are configured.

(I might just tackle this issue myself since I also initially contributed that command)