Extension breaks intellisense/custom completions

[Tristano8]

Steps to reproduce:

• Define a custom formatter in a VSCode extension

const completionProvider = vscode.languages.registerCompletionItemProvider('csv', {
		provideCompletionItems() {
			return [new vscode.CompletionItem("test")];

• Install custom extension and edit a csv file with Rainbow CSV also installed

• First three columns, the completion code runs:

• After the third column, all subsequent completions do not run:

• When running the above with Rainbow CSV disabled, this does not occur.