Consider [0] to be part of the first member group

src/printer.js

@@ -3723,13 +3723,20 @@ function printMemberChain(path, options, print) {
   // The first group is the first node followed by
   //   - as many CallExpression as possible
   //       < fn()()() >.something()
+  //   - as many array acessors as possible
+  //       < fn()[0][1][2] >.something()
   //   - then, as many MemberExpression as possible but the last one
   //       < this.items >.something()
   const groups = [];
   let currentGroup = [printedNodes[0]];
   let i = 1;
   for (; i < printedNodes.length; ++i) {
-    if (printedNodes[i].node.type === "CallExpression") {
+    if (
+      printedNodes[i].node.type === "CallExpression" ||
+      (printedNodes[i].node.type === "MemberExpression" &&
+        printedNodes[i].node.computed &&
+        isNumericLiteral(printedNodes[i].node.property))
+    ) {
       currentGroup.push(printedNodes[i]);
     } else {
       break;

tests/method-chain/__snapshots__/jsfmt.spec.js.snap

@@ -719,6 +719,10 @@ const version = someLongString
   .pop()
   .split(EOL)[0]
   .trim();
+
+const component = find('.org-lclp-edit-copy-url-banner__link')[0]
+  .getAttribute('href')
+  .indexOf(this.landingPageLink);
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 const version = someLongString
   .split("jest version =")
@@ -726,6 +730,10 @@ const version = someLongString
   .split(EOL)[0]
   .trim();
 
+const component = find(".org-lclp-edit-copy-url-banner__link")[0]
+  .getAttribute("href")
+  .indexOf(this.landingPageLink);
+
 `;
 
 exports[`test.js 1`] = `

tests/method-chain/square_0.js

@@ -3,3 +3,7 @@ const version = someLongString
   .pop()
   .split(EOL)[0]
   .trim();
+
+const component = find('.org-lclp-edit-copy-url-banner__link')[0]
+  .getAttribute('href')
+  .indexOf(this.landingPageLink);