color section – background color with gradiant and rgba-color-code does not work

Dear Enfold-Team,
I’m using Enfold and for me it is a great theme. But now I have troubles with color sections for the 2nd time.
I defined color sections with gradient background colors from f.e. rgba(148, 12, 114,0.4) to rgba(148, 12, 114,0.7).
Worked fine.
But – I don’t know the initial cause – the gradient didn’t work longer. In no color section. From this moment the ATB produced only solid background colors. Unattached from my colordefinitions.
The same behavior I had during a prior project. My workaround was, that I choosed pantone-colors.
Do you have any solution for this behaviour?
Best regards
Ingo