Esp32 debug - not stopping at source

Advanced Solutions Debugging
6

Tried this. no changes. back to situation when debugger not working at all.
And I have same issue, like here ESP32 & PIO Unified Debugger - #64 by ivankravets
I run blink example. just added serial output there, no other changes.
I start debug with or without preload setting.

  1. it stops in app_main, when I do F10 or F11 it stops in ASM code …rtc_slow_clock
  2. when stopped in app_main i can set bp in loopTask, it stops there
  3. then i press F10 - it goes and stops in 'loop` (but i was on ‘setup’!)
  4. next step F10 - it stops at IPAddress.cpp IPAddress::printTo…
  5. next F10 - small error message with red cross in bottom right corner.
    …
    something is broken either in opencd or opencd interfacing module… i’m on kubuntu 18.04

one question i have arised - is it possible to disable debugging for core0, and leave it for core1, where arduino task is running?