Reason 12.2.4 is out now which includes a number of bug fixes and performance improvements. Importantly, it fixes a critical bug where some VSTs could appear very small on Windows. With this update, you can turn on or off auto-scaling for individual VSTs in the Manage Plugins window to change this for relevant VSTs.
Simply launch Reason 12 to start the auto-update process. Read more about the specific changes and fixes here.