WebUI entries giving broken pages in popups in embedded mode

Hello, we are facing a particular issue with al lof our Chrome WebUI entries.
We have an integration that autocreates the webUIs of our network appliances when they are located and scanned.
The issue is: when we browse the webUIs, every popup (e.g. in Cisco switches UIs, say we want to add a vLAN) gets opened in a new tab with a broken HTML.
If we use the same webUI via classic Chrome, it works well of course.
How do we manage popups in RDM Chrome embedded entries? See here the broken version and the correct version.

Thank you in advance, our department could really benefit from centralizing everything in RDM.