Toolbar error position when adding elements

I made canvas in modal, but there were a few bugs, when I added a new component, the position of the toolbar went down, the top canvas value that was initially 0 changed (console.log (r.canvasTop) in grapesjs.min.js), but when I resized the browser, everything was normal again (the bug only happens every time the page loads), how can I fix it, Thank you very much.

when dropping the component, the position of the component (indicated by the green line) is not appropriate.