Browser: Chrome/Firefox/Edge
OS: Windows
My coworker and myself are working on a new site in Bricks 1.8.1. Throughout the day working, we experience our globally created classes sometimes getting deleted.
It happens when you are working on a page, create new set of classes for a card or something. Save the changes and everything looks great on backend and front-end. Lovely. Then I close the builder window and go do something else, like edit a template or something. When I come back to page on the front-end, the styling is missing from the elements I just created. Content is there, but my custom global classes have been deleted.
I only keep Bricks Builder open in one tab/instance at a time. It happens 2-3 times a day approximately.
Getting frustrating rewriting classes all the time and crossing fingers that this time it won’t be deleted randomly. 
Anything we can do?
Hey Sebastian,
thanks for your report.
I understand that this really is an annoying issue. Without some exact steps to reproduce it it will be really hard to track down the exact problem though – if any. Maybe you can use a tool like Jam which can record your last steps automatically so that you can send us a report as soon as you stumble upon the issue again?
Best,
André
Thanks, I’ve added Jam to my browser and will report back 
@aslotta I have been experiencing the same since quite a while.
It only happens here on my end, when two different backend users are working AT THE SAME time on different pages in Bricks builder.
Everything works perfectly fine for the two guys, class creation works for both, styling those classes works for both, both on frontend and backend.
And suddenly NEW classes (including their settings) of ONE user are lost … as if they never have been created. Content is still available, but classes are completely lost.
It nearly happens everytime when working in common at the same time. Problem is, that the exact point of time is not predictable.
Our solution for now is, to NOT work inside Bricks builder at the same time with two different users. Kind of a pity, cause this would be a huge gain in productivity…
Hey @beziehungsweise,
let me quote Thomas from a previous conversation about a similar issue:
Are there multiple people working on his site? If so, if someone else has the builder open, and then changes the classes, those old values could overwrite whatever he might have added in the meantime.
So as of now multiple people working in Bricks at the same time adding, changing and deleting classes comes with the risk of overriding each others changes.
Best,
André
Hi Andre,
thanks for coming back to me.
Since we have not been working on the SAME classes, we always thought that it should work.
But ok, yes … understood! Solved!