I am having many of the same problems reported in feedback and in the questions forum. My editor switched from previous to "new" over the weekend. It seems as if these questions and frustrations have been spread out over time and aren't impacting everyone at the same time. Who knows why that is? But...
I am a user that uses the copy and modify a weekly email in the same fashion for nearly two years. One section changes completely each week but the others are simply modified to the new info. It is a weekly "color" feature at a discount. I would even call what I do the "master" because when creating a "master" you still have to be able to copy that master over and over as I do.
I can't even put clickable links into my images (which is very important to our business). This is true for me across browsers (Firefox, Chrome, Edge). I have this problem when I copy and when even tested creating an entirely new email template. My colors won't changes on my dividers even when they show in the editor as changed in the builder elements.
In Firefox, my spacing disappears (this seems to be reported back in Feb. 2022). In that question, it was suggest as a work around to move to another browser. Working in Chrome fixed that particular issue, but only that.
These issues exists across browsers. I might not be the most proficient email builder out there, but what I am doing is working well for the business and is a core part of our sales each week. We can't afford this type of wrestling with a company product that worked as we needed it to until it did on August 29, 2022.
I actually went in and choose a template and rebuilt for this week's email. It threw me back to the old editor which is really weird and everything worked as before. But then I tested making a copy of the "master", the copy immediately reverted to the new interface and all the glitches resurfaced. So right now, I am thinking I am going to have to build from scratch every single email campaign, every detail including things like the header and footer. This is a significant increase in time which means our business is losing money while paying for a service.
It seems these buggy problems have been wildly reported but the answer is frequently try a different browser or it's not effecting everyone. It might not be and it certainly seems like the newer interface isn't rolled out to all users at the same time. But if that is the case then each wave of the roll out has the same types of buggy problems centered around not being able to do pretty normal things that all users do to create emails.
