You may have read the short reflection by a dismissed pastor Tim Stephens, Was it Belief or Behaviour. This is a longer response by another dismissed pastor Derek DeVries, that includes much documentary evidence to challenge the narrative: 1) that the matter was unrelated to complementarianism, and 2) that the churches were divisive. It is important to be Bereans in these matters.
Regarding the 2026 Expulsion of Three Churches from Fellowship Prairies (version 2)