1wire sensors diappearing

I have multiple 1wire sensors (DS2438 + DS18B20) and they work fine most of the time in HA. But two of the DS2438 sporadically disappear from the bus - probably because of the long bus length. This was never a problem with my old home automation system as this happens seldom and only for a few seconds. But HA removes these devices and then adds them again with all configurations like enabled entities lost. What can I do to avoid this? I do not want to reconfigure this devices regularly.

Try dropping the resistor to 3k or move the power supply closer.