xdan/jodit 4.15.3 on GitHub

#1474 An iframe lost its box when the editor was created inside a hidden container. The resizer wraps every iframe in a <jodit> element and copied offsetWidth/offsetHeight into it, but both are 0 while an ancestor has display:none, so the wrapper was pinned to 0x0 and never corrected once the container became visible. The following content then painted over the video. The wrapper now falls back to the iframe's own width/height attributes when the element cannot be measured, and is left to size itself when there is nothing to fall back to. Relative values such as width="100%" are not turned into a fixed pixel box.