Comments getting removed on saving in lfr-editable html fragment

• Type: Bug
• Status: Verified
• Resolution: Unresolved
• Affects Version/s: 7.2.X
• Fix Version/s: 7.2.10 DXP FP9
• Component/s: Tag Libraries > Liferay Frontend Taglibs
• Labels:
  • ee-7.2.x-only
  • ee-ts
  • liferay-fixpack-dxp-9-7210
• Fix Priority: 3
• Git Pull Request: https://github.com/dacousalr/liferay-portal-ee/pull/178

Steps to reproduce:
1) Create a content page
2) Drag the Free HTML component on it from the default fragments list.
3) Edit and enter a simple HTML in it.
Example: <!-- Comments --> <h1>Comments Testing</h1>
4) Save it.
5) If you open it again the comments won't be there.

Environment: Liferay 7.2 with Fix pack DXP-7

Expected Behavior: Comment should be present along with the text.
Actual Behavior: Comment is not present, only text is present after reopening the edit option.