I have this issue where if you are in a WhatsApp group, your phone is locked, you receive a message, first one you get alerted with sound, but when other people in the group also message in the group right after (a couple of seconds) that first message which you were alerted to, you don’t get sound notifications for those. However, you will see notifications of those messages on the badge or status bar, etc. Just no sound for the subsequent messages if it happens back to back.
Hope this makes sense. If it does, is this normal? I can’t remember as I recently moved from iPhone to the S10 Note Plus.
Sound and Notifications are on. Silent Notifications are off. This only happens to WhatsApp groups.