Matomo 3.14.1

Content Interactions not shown in UI report, but clearly visible via API requests (or during the creation of a segment based on User Interactions with content)

Steps to reproduce:

1. setup counter for site
2. go to your site and open js console
3. call _paq.push('trackContentImpression','PublicationOne','PublicationText', 'https://example.com/news/123'); in console as many times as you wish
4. notice to passing requests to index.php with c_n, c_p, c_t parameters
5. go to Matomo interface (Dashboard for selected Site -> Visitors log) and see this "user activity" (as content impressions)
6. now back to console and call _paq.push('trackContentInteraction','click','PublicationOne','PublicationText','https://example.com/news/123'); few times
7. notice to passing requests to index.php with c_i, c_n, c_p, c_t parameters
8. switch back to Matomo interface (Dashboard for selected Site -> Visitors log) and see this additional "user activity" (as content interactions)
9. now go to Behavior -> Contents -> Content Names for current date

And notice that we have counted content impressions but empty content interactions.
Anyway if we click on "Export this dataset in other formats" and choose some format for export (like HTML for example), we get a nice table WITH CORRECT nb_interactions numbers!

For example:

/index.php?module=Contents&action=getContentNames&idSite=6&period=day&date=2020-09-30&segment=&showtitle=1&random=4231
and I got this:

Note on empty "actions" column

But with this /index.php?module=API&method=Contents.getContentNames&idSite=6&period=day&date=2020-09-30&segment=&format=HTML&token_auth=...
i got this:

Note on nb_interactions column (nevermind of too much interactions -- result of manual _paq.push('trackContentInteractions'...) calls via js console for testing purposes)

As I can see, a call method getContentNames via module Contents returns different results with calling method Contents.getContentNames from module API.
Is it normal? Or I miss something?