List Box text does not update after selection until click elsewhere

Assuming this is a bug, but just wanted to check. When I select an item in a list box, the value does not update (is left blank - so no value is shown) until I click the sheet somewhere else. Any way to change this to update right when selected?

image description

As seen in the gif, the value is blank until a mouse click happens elsewhere

Linux CentOS 7

LibreOffice (Calc)

Have not seen in any 6.x version on Mint 18.3 (using TDF versions). Possibly distro problem?