Third Time is not the Charm for Postponed Wedding

Need opinions:
My Bff’s wedding was postponed during the pandemic and I am a bridesmaid She ultimately decided to split her events up. She held a smaller religious ceremony this past fall (bridesmaids were not needed or used for this event) and scheduled a reception for this summer (where bridesmaids would be needed and featured). I have participated in every event and was present at the religious ceremony and the small dinner that was held after.

Now the reception has been postponed again bc of the ongoing war in Ukraine bc many of the Brides family are there. The new reception date is now the same date as my first cousin’s out of state wedding. (i have only received my cousins save the date at this point)
Though i feel both brides would be equally understanding I’m torn over what to do. Keep my promise to my friend despite the ongoing changes or attend the arguably more fun out of state wedding as a guest?
Also at this point I’m concerned that I run the risk of declining my cousins invitation only to have my BFF postpone again. Additionally, it feels weird to decline my family members wedding invitation in favor of what is simply a party to celebrate my friend who will have been married for over a year by the new date. But am i being tempted to ditch my bff on the “big day” she has been waiting for by an out of state vacation?
At what point can you draw the line in participating in these postponements and ever changing plans?