Not sure whats is going on here but the Bootstrap builder generates hugely overblown css, this in turn does not validate. Google seem to have punished all the sites that have been done in this programme and some sites showing over 1,200 errors with the css (these sites have dropped 3 pages on organic listing)......... Coffeecup guys can you explain this?

I suggest this be reported in the Support Room (button in this page), along with the relevant .rbb project file.

Frank

Hi Phil,
Please open a support ticket to CC with what you have found. This is a user forum, and the CC staff don't visit here very often.
And when you get a reply from them, it would be very kind of you if you could post it here, as I reckon it will be of interest to many.

Still no reply :-(

It may be holiday time, also at CC. I've just had a reply to a ticked posted 10 days ago.

Another thing is, if you are using the standalone RBB, please be aware that it uses a beta version of Bootstrap 4. If you have SDv3, try the Bootstrap part in there to see if the code it spits out is likewise faulty. SDv3 is running a stable version, 4.1 I think.