Please tell us some basic information before asking for help:
Model Name: Max Pro M2
Firmware Version: Latest .101
Rooted or not: not
Frequency of Occurrence:
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.
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Today I have encountered a weird bug. The nevigation key at the bottom 1st one is showing and rest two got disappeared after making a phone call.
After the device restart it appeared again.
Below is the photo.