Hi bflmpsvz2
Have you started noticing this behavior after installing the latest patch version 2019.012.20040? Since you have mentioned the latest version, we would like to get more information to understand whether this issue caused by latest patch or its specific to system.
If this happened immediately after installing the latest patch version 2019.012.20040,then try repairing application installation once. Open Reader>Help>Repair Installation.
Thanks,
Akanchha