Judgement aside (they make matters worse for global consumers by tightening output by almost 90K barrels per day), the timing is not a coincidence:
workers always strike when their bargaining power is high!
No oil workers went on strike when oil prices went briefly negative back in the May of 2020.
But now, they have the time on their side to eke out some concessions (details are largely irrelevant).
I.e., tightness in supply breeds further tightness when opportunists try to take advantage of the situation.