I'm currently running RHEL 7.6 and whatever version of emacs comes with it (I don't have access to my system at the moment so can't provide the version number). Sometime in the last 2 weeks my sys admin applied some patches/updates to my system (not sure which ones yet) and now suddenly emacs frequently stops displaying what I type until I move focus out of the editor window and then back into it, at which point everything I typed before then suddenly appears. This happens frequently enough (every minute or so of continuous typing) that I will have to switch editors if I can't find a fix. This behavior has been observed in both Matlab and LaTeX modes, and did not go away when I temporarily ditched my .emacs file. I have no clue where to start with this one---all my google searches have come up empty. Any thoughts?
Update (4/8/19): Below are the details/versions of my OS, emacs install, and desktop environment:
OS: Linux lahaina 3.10.0-957.10.1.el7.x86_64 #1 SMP Thu Feb 7 07:12:53 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
emacs (non-terminal): GNU Emacs 24.3.1 (x86_64-redhat-linux-gnu, GTK+ Version 3.22.30) of 2018-09-12 on x86-039.build.eng.bos.redhat.com
desktop: MATE Desktop Environment 1.16.2
Also, at this point I'm pointing the finger at MATE: this morning I switched to GNOME (Version 3.28.2) as an experiment and worked all day in emacs without a hiccup.