Especially with 26214400 being a nice even hexadecimal 1900000, I hope you didn’t truncate a file.
Having a destination lose (or somehow not get) dblock files is never good, but the damage is limited because only some files and versions have any data in the dblock. See the link for more information.
There are many ways to test or verify files more completely, if you want to run a better test right now.
Or if “configured another backup” means a start-over, that should work unless it gets the same issue.