The same(when hitting publish it’s not actually publishing it) is happening to me.
I tested in so many ways(deleting cookies and cache, using “incognito mode” on chrome and firefox…) and still not working. Some days ago was working fine but today not(I didn’t edit my website with the builder since 1-2 weeks ago, but today I tried to edit and got that weird bug).
I don’t know what’s exactly happening, I sould say that at least thanks to 000webhost I have a free website builder for testing things for free and that’s nice, but the bug continues.
Please try to fix.