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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(214.4, 86%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EIG%3C/text%3E%3C/svg%3E)
Hello,
after installing Edge Version 140.0.3485.52 (Android and iOS): September 8, 2025 and newer on iPad our site cannot display iframe with weird command in Edge (Safari works, PC version works):
{"command":"registerAsChildFrameAck","remoteFrameId":"f2676238dc84d6ae727acdd8ae6c39e5"}
Screen of ERROR:
I was able to test it again on version 139+ and it was stable.
We tried:
We cannot find any decription or help on registerAsChildFrameAck.
Thanks,
Ian
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(48, 89%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EP%3C/text%3E%3C/svg%3E)
Hello, good day and thanks for your question. Sorry to know about this and if this is the case on a new update which points out a bug and it is best to roll it back and to report it to the team that is working on Edge by sending a feedback within the browser and hopefully this will be patched on the next update.
I have limited hands. The device belongs to one of the Czech banks. There is another iPad Edge limitations that prevents to send something intersting for troubleshooting.
I just made new discussion on MS Edge Techcommunity which is waiting for approve to be posted.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(236.8, 48%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDT%3C/text%3E%3C/svg%3E)
The new Edge (140+) on iPad enforces stricter iframe and cross-origin policies. Sites using X-Frame-Options or Content-Security-Policy: frame-ancestors may fail to load. Verify the site allows embedding and ensure HTTPS is used. At dev technosys, we recommend testing in multiple browsers and updating iframe permissions on the server.
Nothing helps. It wasn't set. Even If I set it same problem.. Tried even iOS version 26 same error.
I see, hoping that this gets sorted out the soonest and to get that other post approved.
Resolved via different PostMessage handling.