The thing is the pure ARM internal political conflicts.
ARM China CEO WU, a US citizen, claimed that he reported few high-level managers' corruptions and then he got fired by the ARM Softbank. ARM Softbank united with all board directors, including all Chinese investors, to fire Wu.
But when Wu franchised ARM China, he signed a voting agreement with large shareholders to make sure he can not be fired for no reasons. So he claimed the board voting was illegal and Chinese shareholder violated the voting agreement. So even Chinese shareholders want him gone, but he refused to leave.