LSP: LSP cannot be automatically enabled in ST4

Describe the bug

LSP is installed for ST4, but cannot be automatically enabled when editing files. Here is the example for R file:

// Settings in here override those in "LSP/LSP.sublime-settings"
{
	"clients":
	{		
		"rlang":
		{
			"command":
			[
				"R",
				"--slave",
				"-e",
				"languageserver::run()"
			],
			"enabled": true
		}
	},
}

However, when opening the new R file the left bottom corner cannot indicate rlang is loaded. A stranger stuff is that when I click LSP: Enable Language Server Globally, and then the left bottom corner says: No config available to enable. Another stranger stuff is that if I edit the LSP settings a little bit (e.g. add the comma and then remove it) and save, then I can find the left bottom conner in the R file indicates that rlang initialize and work. Such situation also applies for pylsp, so that LSP cannot be enabled globally unless I re-open the settings of LSP and modify it a little bit and save.

Expected behavior LSP should be automatically loaded like in ST3.

Screenshots

Then everything works well.

Environment (please complete the following information):

• OS: Running under: macOS Big Sur 11.3.1
• Sublime Text version: 4107
• LSP version: 1.3.1