Infowindows behaviour turns weird when you edit the HTML behind

Context

The default parsing/rendering behavior of the infowindows is overridden when user apply any change to the infowindow template using the HTML editor.

Steps to Reproduce

1. Take any dataset with some string column
2. Edit that string for an specific row and add HTML code to it, something like

<p><strong>The Puxa Gallery, in the district of Las Salesas, is a modern art gallery, offering a glimpse into its participation in international art fairs and its firm commitment to supporting emerging artists.</strong></p><p>At the helm of this space are Nuria Misert, former director of the Galería Marlborough Madrid, and Ángel Antonio Rodríguez, journalist and art critic. Ardent defenders of freedom from indoctrination, in favour of permanent debate, they seek to disseminate the work of new artists whilst promoting their dialogue with emblematic authors from other generations.</p>

1. In a different row, set that column to NULL
2. Create a map from it
3. Add an infowindow to the layer, and select at least the string column above
4. Check the infowindows of both features
5. Go to HTML editor for the infowindow, add an space at the end and apply the changes
6. Check the infowindows of both features again

Current Result

(step 8)

• The infowindow of the feature @ step 2 displays HTML tags in the linked field
• The infowindow of the feature @ step 3 displays the column title and NULL or empty string value

Expected result

(step 6)

• The infowindow of the feature @ step 2 displays plain text, the tags have been sanitized
• The infowindow of the feature @ step 3 if the column value is null, the linked field is not displayed at all (not even the title)

Browser and version

Not relevant

.carto file

Not needed

Additional info

cc @piensaenpixel

[AbelVM]

F*CK U STALE BOT

:trollface:

[xavijam]

Doing then the second point 💋 .