It is possible that a button that glows during a counter stays glowing indefinitely.

This is due to the fact that SAO:CheckCounterAction starts by checking self:IsSpellLearned and return immediately.

In the event that a spell in un-learned after e.g. a respec, the following situation can occur:

1. start in the spec with talent that activates the counter
2. activate the counter
3. respec asap

In this case, at least theoretically, the glowing button will not un-glow.

#196 might fix this issue.

Fixed by #220. Unlike what issue describes, the problem does not reside in glowing buttons, but rather in spell alerts. Glowing buttons were un-glowed already, because the action button are updates as soon as an ability is un-learned, and the glowing button system already updates dynamically when action buttons are updated (this was developed a long time ago to account for conditional macros).