Mine does this currently, every so often; most likely caused by the poor quality cable I’m using. It’s on my New Year’s list of replacements. 
(And, you;re right, it’s annoying).
So, your issue could be the same, or it might be something else entirely. I’m sure other Members will have a suggestion or three.
But first, a little housekeeping:
Note that the text below has been pre-prepared and possibly edited just a little to suit the occasion.
Thanks for the inxi output;
(you can ignore that it’s mentioned below).
Welcome to the Manjaro community.
As a new forum user, please take some time to familiarise yourself with Forum requirements; in particular, the many ways to use the forum to your benefit:
Required Reading:
The Wiki:
Update Announcements:
The Update Announcements contain update related information and a Known Issues and Solutions section that should generally be checked before posting a request for support.
System Information:
Output of the following command (formatted according to forum requirements) may be useful for those wishing to help:
inxi --admin --verbosity=8 --filter --no-host --width
Be prepared to provide more information and outputs from other commands when asked.
Regards.