Figured it out.
For anyone interested. The problem was the use of this function in my html
[src]="getTrustedYouTubeUrl(item)"
The reload side effect was gone once I changed the code to calculate the safe url when the data is loaded in my service and changed the iframe binding to this
<iframe [src]="item.video.safeUrl" scrolling="no" frameborder="0" allowfullscreen></iframe>
Note thatr I am now binding to a property.