Writing >20 Bytes to Characteristic causes all registered Write Callbacks to fire

Using ESP32_BLE_Arduino on firmware side and using nRF Connect phone app to send TEXT to a characteristic works great, but if I send more than 20 characters in the string, I can observe all of my write characteristic callbacks fire in response. I don't think it's harmful as they just get executed with the previously written values, but it's a bit concerning. Anyone else seen this behavior?