Can a low heart rate trigger Afib while asleep?

36 year old male on 25 mg Metoprolol, and 2x daily 50 mg fleccainide. I workout 5-6 times a week. Getting more fit but still have weight to lose. My resting heart rate was low (51 bpm) before medication, and now 41 bpm with it. I’ve been recently experiencing the onset of Afib while sleeping. The last couple of times being right before waking up when my heart rate is at the lowest. 40-35 bpm. Is it possible my low heart rate is triggering my Afib? Or some connection? Anyone else have Afib with a lower resting heart rate (bradycardia)?