ESP8266 to Arduino -> Receiving partially gibberish data #49

Hello, first I want to say thank you for your contribution.
Maybe you (or someone) can help with the problems I faced with the ESP8266 as time module to send the date and time via the software serial (pins 7 and 8) to arduino nano. With BaudRate 38400 works much better than with less speed, but even with 38400 I receive partially unreadable data.

Before this library I used SoftwareSerial.h and it worked, but since I use one output to fire a triac, serial read delays are not acceptable.

I have already tried setting ESP and NeoSW to 9600, 19200 and 38400.
38400 works best, but not without gibberish.
9600 = 80% gibberish - completely unusable.

Do you have a tip or idea how I can make the communication between ESP and Nano better?
Thank you!