I've been dealing with the same issue last couple of months. I've googled the same issue but i guess no-one has address this issue before.
previously when i change the hex color transparency, for example #FFFFFF, the Chrome devtools was giving me the option of RGBA version like RGBA(255,255,255,10%) but now when i do the same thing the result is for 10% white color transparency ise rgb(255 255 255 / 10%)
As you can see the RGBA is now gone and the devtool onşy show the strange version of rgb type.
Does anyone issued the same problem before? And do you know how to fix it?

