http://www.straitstimes.com/opinion/myanmars-long-journey-to-peace-starts-in-panglong
Independence from European countries after WW2 may cause confrontation between local ethnics or religious groups.
But, in Myanmar, it was replaced with local autonomous governments and Myanmar itself.
And, tens of years later, it became confrontation between democratic leader and military regime.
So, in this context, until Aung San Suu Kyi's returning to the government since the end of WW2, Myanmar's political situation hadn't been stable.