Thank you for your post.
There is a feature request for this sort of feature where it will either confirm that you want to move it, or you can undo the action.
You are able to lock layers in the app to help with this issue. To lock a layer that your placemark is in, you can open the Map > tap on the Map Features List button > Locate the layer > tap on the “info” button > Lock the layer
I have also added you to the feature request so you will be notified when it is implemented.