Weird layout at page first load with Checkbox and SSR on.

[Saad5400]

So for some reason when I use the Checkbox component and SSR turned on, I get this for a split second at first page load:

For reference, this is what the page should look like:

The issue is fixed by either turning off SSR, or removing the Checkbox component from my page.

Any idea what could be causing this? Thanks in advance.