We have a use case where we have put the timeline on Account page with Case as the related object. We used Apex as data provider to be able to pull and consolidate all case comments per Case record. This worked well. However, the Title hyperlink didn't work such that it's not opening the Case record.
To workaround, we have used the getBaseURLRecordDetail and returned the org's domain URL which made the Title hyperlink worked, BUT it's now opening on a new browser tab, instead of opening it as a console subtab under the Account. A little inconvenient for the users.
Apparently, if the data provider is apex class, it will by default open the link in a new window. It would be good to improve the experience by allowing the Title hyperlink to still open within the console tab even if the Data provider is Apex Class.