Authoring overlay not working in edit mode on page load§

Hi all, I have a problem with AEM authoring in SPA Editor. When the page in /editor.html is loaded it has edit mode as default but authoring is not available. Overlay is not working neither any components are listed on the sidekick. 1 on 20 visits authoring works fine after load. When we switch to preview mode and back to edit all is as expected. What can I do to make spa editor working on page load? We use React and AEM SPA Editor, AEM 6.5.13