Hello,
When my client is adding in blog posts they keep getting <g tags appearing.

The full tags look like this <g class="gr_ gr_120 gr-alert gr_gramm gr_inline_cards gr_run_anim Grammar multiReplace" id="120" data-gr-id="120"> </g>

These are creating errors in Google AMP. What is causing these to appear when adding blogs and how can I stop them.

Thanks