It's fine to automatically give a signature suggestions when I type a function.
However, in my case, two signature suggestion dialogs are displayed as follows:

Actually, the bottom one shows when I type the function name sum, while the top one shows when I finished typing the parentheses. If I type slowly, the two dialogs show in turn; if i type fast, then the two dialogs shows simultaneously, which really bothers my typing.
I install jupyterlab-lsp according to the installation instruction in the readme.md, choosing pylsp as the language server.
My question is how to configure so that only one signagure suggestion is displayed. Thanks!