The dropdown menu button of the course cards in block_myoverview only shows on hover (Defined like that in theme_boost).

On devices without hovering (most mobile devices) the button will not be visible (opacity is always set to 0). You can click it if you tap on the place where you would assume its position, but this is bad from usability point of view.

Suggested solutions:

• Always show button
• Use media query to detect devices without hover function/without pointer and set opacity to 1 in this case

Additionally: This is also an issue in the list and description view of the block.