I am using Huawei P9 and P9 Lite, i tried Textra in both mobiles for sms scheduling, this feature was awesome and i am using for more than a year now but now from last 6 months its creating an issue. the scheduled msgs dont start sending on scheduled time unless i restart the phone or send manually 1-2 times then the next scheduled msgs will start sending according to schedule.

P.S. i factory reset the phone, but the problem is still there. i am scheduling groups of around 100 people each.