Wrong mouse hover effects in user menu in Boost

1. Log into Moodle 3.5.3 (I'm using Build: 20181112) with Boost theme
2. Hover mouse over user menu profile link (top right) - cursor changes to insert text icon instead of the pointing finger icon; (the text link color changes to some darker blue, though this probably is OK upon checking back in 3.5.2)
3. Hover mouse over user menu's dropdown icon (top right) - cursor resets to the default pointer arrow instead of the pointing finger.

See attached screenshots.

The problem concerns Boost only; Clean behaves OK.