floresta:
We don't know for sure which specific display you are using since you haven't provided that information so a lot of what we are providing is speculation.It is time for you to start over again with a simple circuit and sketch that just uses one LCD. If that works OK with each LCD then change the sketch to use both LCDs
simultaneously.I would add the other I2C device(s) on next and then the 1-wire device(s). When things stop working you should have a pretty good idea of what caused the problem.
Don
I use 16x2 LCD Displays of different brands. One is called: TC1602A. The other1602 QAPASS. And serial I2C IIC adapter called LCM1602 IIC.
Micky