Start Value Not Working on OL List

I have a post with a set of instructions but midway through the list I have an image. I then want to remaining instructions to start from a higher value which I am setting in the Wordpress post settings for start value. I can see in the code for the post that start=3 is being added to the

but this isn't being shown on the public post.

My CSS for the OL and LI is as follows:

.entry-content .list-container {
    counter-reset: list-counter;
}
.entry-content ol {
    list-style: none;
    margin-left: 1px;
}
.entry-content ol li::before {
    content: counter(my-awesome-counter) ") ";
    margin-right: 2px;
    font-size: 19px;
    font-weight: 600;
}
.entry-content ol li {
    margin-bottom: 40px;
    margin-top: 45px;
    counter-increment: my-awesome-counter;
    overflow: hidden;
}

So, at the moment instructions go 1,2,IMAGE,1,2,3
But it should go 1,2,IMAGE,3,4,5

Thanks!