Bricks Version: 1.3.7 beta
Browser: Chrome 90
OS: Windows
When editing a page with Bricks 1.3.7beta, when you enter a negative value for the margins in pixels (px), if close the tab and open it again, it will apply your value instead of the unit and your value will disappear.
Step 1 : apply negative value
Step 2 : close tab
Step 3 : bug
Step 4 : repeat to amplify bug, can work an infinite number of times
It happened with % too.
I also happen to have negative values turned into positive but couldn’t find the specific mechanic that triggers it.
Hope that helps get the beta into a stable release.