This article is for you if:

• You use Office 365 (SharePoint Online) or SharePoint 2019 On-Premise environment.
• You use Classic SharePoint Experience.
• You have ShortPoint SPFx app installed on your SharePoint sites.
• You use SharePoint Calendar Web Part inside complex layouts.

Issue

The events from a SharePoint Calendar WebPart appear shifted inside the complex ShortPoint layouts (for example, ShortPoint Tabs). They are not taking the correct places, and instead are shifted to the right, like shown below:

Resizing the browser window or switching between the months in the calendar helps to resolve this issue, but it returns after a page refresh. 

The solution in this article will make sure to trigger a resize event on the Calendar to fix this issue.

Reason

Sometimes when adding SharePoint Calendar WebPart into complex layouts, the WebPart might be shifted a bit when it's being rendered into the page. 

Solution

To make the SharePoint Calendar events render correctly inside the complex layout we will need to add ShortPoint Code Design Element with custom JavaScript inside it. 

It will make sure to trigger a resize event on the Calendar to fix this shifting issue, and let it fix itself.

Step 1: Add Code Design Element to your page

Edit your page. 

Outside the ShortPoint complex Layout design element you are using to display SharePoint Calendar, insert the ShortPoint Code design element from the Page Builder:

Note: 
ShortPoint Code design element was introduced in ShortPoint SPFx 6.9.30.6 version.
Make sure, you have it or more recent version to use this solution.
You can always check the latest public ShortPoint version on the ShortPoint Roadmap page.

Step 2: Add custom JavaScript

Copy the following custom JavaScript code:

var $ = shortpoint.$;
$('[data-toggle="tab"]').on('shown.bs.tab', function (e) {
  setTimeout(function() {
      shortpoint.core.responsive.triggerRealResize()
  }, 500)
})