The description of the haste spell states, in part:
Choose a willing creature that you can see within range. Until the spell ends, [...] it gains an additional action on each of its turns. That action can be used only to take the Attack (one weapon attack only), Dash, Disengage, Hide, or Use an Object action.
This obviously does not allow to use any other actions that you can usually use, like casting a spell, as the more specific rule for haste beats the general rule of what actions can be used. But what if some other specific effect grants an additional option to use an action on?
For example, say an Assassin Vine has restrained me using its Entangling Vines. That grants me the additional action option of breaking free from the vines:
A creature restrained by the plants can use its action to make a DC 13 Strength (Athletics) check, freeing itself on a successful check.
Can I use my additional action from haste to try to break free?
As far as I can tell, these are two specific rules contradicting each other; neither is more "specific" than the other.
Is there an official ruling on this rules interaction? If there is no official ruling on this, does anyone know how this would be ruled in AL?