Problem

I am trying to create a button with a sliding animation. The button has a border-radius and uses pseudo-elements to achieve the effect.

Here is the markup:

<div role="button" class="is-style-rt-primary-accent-button">
  <a class="rt-button__link" data-text="HELLO WORLD" href="#" target="_self" rel="noopener">
    HELLO WORLD
    <div class="rt-button">
      <div class="rt-button__circle">
        <div class="rt-button__arrow">
          <span class="rt-button__line"></span>
            <span class="rt-button__pointer"></span>
        </div>
      </div>
    </div>
  </a>
</div>

Here are the styles:

.is-style-rt-primary-accent-button {
    .rt-button__link {
        display: inline-flex;
        align-items: center;
        justify-content: flex-end;
        background: none;
        font-weight: 700;
        padding: 14px 31px;
        position: relative;
        font-size: 14px;
        line-height: 28px;
        overflow: hidden;
        transition: 0.3s ease-in-out;
        text-transform: uppercase;
        border-radius: 64px;
        z-index: 1;
        color: var(--wp--preset--color--accent-1);
        text-decoration: none;

        &::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border-radius: 64px;
            background: var(--wp--preset--color--accent-6);
            transition: 0.3s ease-in-out;
            z-index: -2;
        }

        &::before {
            content: "";
            position: absolute;
            bottom: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            border-radius: 64px;
            background: var(--wp--preset--color--secondary);
            transition: 0.3s ease-in-out;
            z-index: -1;
        }

        &:hover {
            color: var(--wp--preset--color--accent-6);

            .rt-button__line {
                background: var(--wp--preset--color--accent-6);
            }

            .rt-button__pointer {
                border-left: 0.3125rem solid var(--wp--preset--color--accent-6);
            }

            .rt-button__arrow {
                transform: translateX(10px);
            }

            &::before {
                transform: translateX(100%);
            }
        }
    }

    .rt-button__circle {
        @media screen and (max-width: 768px) {
            background: none;
        }
    }

    .rt-button__arrow {
        display: flex;
        align-items: center;
        margin-left: 1rem;
        transition: transform 0.3s ease-in-out;
    }

    .rt-button__line {
        display: inline-block;
        width: 0.625rem;
        height: 0.125rem;
        vertical-align: middle;
        background: var(--wp--preset--color--accent-1);
    }

    .rt-button__pointer {
        width: 0;
        height: 0;
        border-top: 0.3125rem solid transparent;
        border-bottom: 0.3125rem solid transparent;
        border-left: 0.3125rem solid var(--wp--preset--color--accent-1);
    }
}

Here is the recording of the issue with animations slowed down to 25%. Notice that at the X borders, there is a bleed.

What I have tried

1. I have tried playing with z-index and borders. The bleed still persists.
2. Using a div instead of pseudoelements to handle the background animations.
3. Using box-shadow but since the animation is different, I did not pursue that option further.
4. Scaling the foreground (black layer) upon hover.