Some letters are missing in application menu and panel

I recently updated Manjaro and found that some of the letters in the application menu items were missing.I tried changing the font and connecting to an external display but it was the same. I can't find out what the problem is and I decided to approach you guys. I have posted a screenshot below so that you could understand the issue.

Screenshot_20171014_182947

not exactly the same, but may be related:

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