Does masturbating in the daytime in Ramadan semi-involuntarily after intending to stop it invalidate the fast, and does that affect the reward of the ‘Umrah performed a few days earlier?

Masturbating during the day in Ramadan, after waking up and before semen is discharged, requires repentance and making up for that day, but according to the more preponderant opinion, it does not necessitate expiation.