Agnome-shell bugfix update has been been released for CentOS 7.

CentOS-announce: CEBA-2020:5154 CentOS 7 gnome-shell BugFix Update

CentOS Errata and Bugfix Advisory 2020:5154

Upstream details at :   https://access.redhat.com/errata/RHBA-2020:5154

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

x86_64:
68b19039b1e53465dc3f08f0e56e24f7e1672b449a51dd05f8ae10ff49416b66 gnome-shell-3.28.3-32.el7.x86_64.rpm

Source:
09eaee6b53a8debe898a03e6cbb1a0af1167a5e73d999abb4e5e8cc4de21829a gnome-shell-3.28.3-32.el7.src.rpm