If you are using Universal Post Manager plugin, then it is possible that you might be getting large buttons at the end of the post like this:
Go to AMP settings, then navigate to Design tab and then paste this below CSS code in the Custom CSS text area field and then save it.
div#upm-buttons amp-img {
display: inline-block;
max-width: 70px;
}
This should make it better. I hope this snippet helps you.