I can confirm this is a problem in the Linux builds since v18.06. I just found out about it thanks to you.
UPDATE: I fixed for the next release v18.08 due August 1. There is no easy fix; building from source is difficult and support help not provided for that. v18.03 has this; I do not recommend v18.05 as too buggy. You can have more than one version when using portable or AppImages.