Please tell us some basic information before asking for help:
Model Name: Zenfone 6 ZS630KL ASUS_I01WD
Firmware Version: The only information I can find is in Software information -> Kernel version 4.14.117-perf+
Rooted or not: Not rooted
Frequency of Occurrence: I think the Highest chance of occurring is when the device is connected to power.
APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
On my Zenfone 6 sometimes sms text messages will stop arriving. Usually the feature works fine. I made tests using feature of a web service which sends message to phone number and at these times when it breaks the messages will not appear so I am certain such issue exist. To fix it, resetting device does not always work. The last rime I had to turn airplane mode on for couple of minutes, restart device, turn airplane mode on and off again and after that messaging started to work again. Sending messages works fine at all times it seems. I am using non default messaging program. YAATA currently, QKSMS and Simple SMS Messenger previously and on all of them the issue was appearing.