Solved Android App randomly crashes when creating notification

[pinsami]

• Phone Model: Blackview BV4900 Pro
• Android Version: Android 12
• App Version: 18.1.3.135
• 3CX PBX Version: V18 (latest available) / Debian
• Network Connection: WiFi
• Client is on the same network as the PBX or not? Nope

Hello,
my name's Daniel and I have some issues with some Andoid telephone we use in our company, that are connected to our company's Wifi network.
I have 5 identical Blackview BV4900 Pro (rugged phones) running Android 12,and my issue is that, randomly, some of them doesn't ring when called.
Every time, as soon as I manually unlock the phone and open the app, the issue seems to disappear, and everything returns back to normal.

I enabled advanced logging on every phone, and what I saw is that the app seems to crash when sending a notification of missed call.
Here I attach 3 different logs: two of them (ext 51 and 52) show that logs suddently stop just after a notification of missed call (ext 51 at 10:33:36, ext 52 at 10:32:18), while the third logs shows no issues at all (ext 53).

Both phones where lying on my desk, both where unconnected from power source, and nobody touched them during this test.
The 3cx app is the only app running on theese phones.

The behaviour is very random, and I noticed it on each and every of those 5 phones.

Thanks for your help,
Daniel

 

[ThomB_3CX]

Hi Daniel

Thanks for your feedback.

First I have deleted the log files from your thread for data reasons.
Please in the future send us logs via private message.

Could you send us the zip files for all three logs in private message not just the .log report?

 

[pinsami]

Yep,
message sent, thanks!

 

[ThomB_3CX]

Thanks @pinsami for your patience and information relayed to us to solve this issue.

To any readers on this thread,

There are certain apps that are either pre-installed by the vendor or that you downloaded yourself which might be terminating the 3CX app in the background to improve your phone’s performance. These are usually maintenance, cleaner or optimizer apps.
Look for these types of apps and make sure to either disable, uninstall or whitelist the 3CX app client, as this might result in PUSH notifications getting lost.

Examples of such apps:
MIUI Optimization by Xiaomi
System Maintenance by Blackview
Droid Optimizer
Greenify