It’s not the new hosting. You use another plugin (“mobile menu”) which prevents “Page scroll to id” from scrolling the page (don’t know if you installed or updated the “mobile menu” plugin recently along with the hosting change).
Go to “Page scroll to id” settings and change “Selector(s)” option to:
a[href*='#']:not([href='#'])
Also, enable/check “Prevent other scripts from handling plugin’s links” option.
Save changes and test your page.
PS. I think you also posted a support request in plugin’s homepage which I’ve already responded (check it here).