Alarm will not sound while device is on vibrate mode

[archaicmeander]

Samsung Galaxy S10 Plus
Android 10
Simple Clock version 5.0.4

My alarms will only vibrate while my device is on vibrate mode when they should be overriding my ringtone setting. I can adjust the alarm volume while it's sounding if my ringtone volume is on but it doesn't persist once my device is set to vibrate. I checked all notification settings and permissions and nothing seemed amiss there. Allowing the app to bypass Do Not Disturb and disabling battery optimization didn't solve the problem.

I tested another app from F-Droid, Alarmio, and it still sounds alarms correctly irrespective of other system volume settings.

[AtomToast]

Can confirm this behaviour on my Honor 9 Lite with Resurrection Remix OS (Android 8)

[bluewww]

Same issue on android 10

[MohsenEbrahimi86]

Same Issue on Android 9.0

[pawelu6]

The same applies to silent mode. Currently, the only option to make the alarm clock ring (the phone is set to vibrate/silent mode) is to put the phone in ring mode and turn on airplane mode, which is very annoying.