Communication through parenting app
Started using one of those co-parenting apps to communicate with my ex instead of texts and it's been way better honestly. Everything is documented, no arguments about who said what, and we can both see important dates and schedule changes. If you're still texting back and forth about custody stuff I honestly recommend trying it.
I've heard good things about those co-parenting apps. Keeps things professional and takes out the he said she said stuff. Makes it harder for either person to pull the 'I never said that' card.