i ran a mobile friendly test on your site and it passed.
i also ran a lighthouse test for accessibility ( which would raise an issue with clickable elements ) and that too passed.
And theres nothing overflowing the page to make Content Wider than the screen.
Sounds like a Google bot having one of its moments and it was not able to load all the necessary resources to test page thoroughly. You can recrawl the page and validate the issue is fixed in the search console.
I ran a test on the URL you provided 3 times – it passed on 2 occasions and failed on one.
I would suggest stop testing the page, as your just adding more load to google bots work, and retest at a later time.