How to fix "The tag pwa is disallowed" in AMP pages?

Recently I begin to work for a new enterprise. They need I fix some issues on his AMP pages. Some script or something is adding a pwa tag to the code. For example:

<span><strong>World-class Fertility Treatment at <pwa class="pwa-mark pwa-mark-done" data-pwa-category="spelling" data-pwa-dictionary-word="ReproART" data-pwa-heavy="false" data-pwa-hint="Unknown word: ReproART" data-pwa-id="pwa-073BFF40B8214D6BF9CF8C5B1D2CDC29" data-pwa-rule-id="SIMPLE_SPELLING" data-pwa-suggestions="Re-proart~repaired">ReproART</pwa> Georgian-American Center for Reproductive Medicine, Tbilisi, Georgia</strong></span>

This 'pwa' tags are not allowed on AMP and it causes Google Search Bot errors. Any of you have an idea of what is happening here? It look like a kind of spelling and writing corrector, but I have no idea what script is doing that.

Best regards.