Broken Rich-Editor for model descriptions?

For designing my models I use Shapr3D. This software allows one to publish the model for a web viewer. In Shapr3D I can copy an embed code for this web viewer, which is an HTML iframe.

Well, every time when I edit the description for model, this iframe is gone, and I have to re-enter it again.

To better understand what I mean, you can take a look at one of my models here.

Well, now it seems @BambuLab has removed the ability to paste an iframe to the model description. Yesterday I had a look to answer some comments and I discovered that all embedded web viewer of my 3D models are gone. I repasted the iframe with no luck. It isn’t shown anymore. This is really sad! Especially since Bambu Lab is not very transparent here. I would expect a mention or description of what is allowed and what is not allowed or what works and what doesn’t work.

Possible reason is due to the mobile version, the description display will be mess up in the Handy app.