Hello Stephanie,
Look for this custom CSS:
@media (max-width:540px){
.wp-block-image{
text-align:center;
}
.wp-block-image .alignright,.wp-block-image .alignleft{
float:none !important;
margin:auto !important;
width:100%;
}
}
Add this inside that media query:
.wp-block-image img {
width: 100%;
}
Like this:
@media (max-width:540px){
.wp-block-image{
text-align:center;
}
.wp-block-image .alignright,.wp-block-image .alignleft{
float:none !important;
margin:auto !important;
width:100%;
}
.wp-block-image img {
width: 100%;
}
}
It will make the actual image element fullwidth on mobile thus preventing the issue. Let us this if this helps.