How would individual text only messages be deleted from only one convo

[Android Central Question]

I noticed the other day that in the thread with the person I text the most with, all of the text-only messages from two weeks ago going back to August are gone. Pictures are still there, and if there was a text sent with the picture that text is there, but from 8/15/17 to 10/30/17, every single text message with this person is gone. No other text conversations have had this happen. Has this ever happened to anyone? How can I recover those texts? It seems so bizarrely random.

 

[ManiacJoe]

Which phone?
Which version of android?
Which carrier?
Which SMS app?

Does your SMS app have a feature to delete "old" messages?

You might try an app like
https://play.google.com/store/apps/details?id=com.riteshsahu.SMSBackupRestore
to check the output file to see if the messages are still in the database.
There is no "undelete" for SMS/MMS messages.