Content of some palettes disappears when the palettes width get reduced to its minimum
Create a custom defined workspace.
Activate/select the new workspace.
Open the Text palette by pressing ">"
Drag a text from your score to the palette while pressing CTRL+SHIFT, for example "c.f."
Open another palette by pressing ">"
-> The Text palette remains it's size but is now empty.
Close the other palette
-> All items in the Text pallette are visible again.