RootCauseunvalidated
The message handler in the receiver iframe likely rejects the incoming message because `event.origin` does not match the expected `parentURL` (e.g., due to origin mismatch between environments or dynamic/incorrect environment variables). The sender also triggers messaging on the wrong iframe lifecycle event for mobile browsers, causing the target window not to be ready.
ddfc684e-15e4-41ca-95c2-5179cc870f80
The message handler in the receiver iframe likely rejects the incoming message because event.origin does not match the expected parentURL (e.g., due to origin mismatch between environments or dynamic/incorrect environment variables). The sender also triggers messaging on the wrong iframe lifecycle event for mobile browsers, causing the target window not to be ready.