Xdebug + IntelliJ: Debugger is always one line behind real set breakpoint - php

Question

In my Symfony application I am using IntelliJ Ultimate + Xdebug + Vagrant VM with an remote debug setting in IntelliJ. In the Vagrant box there is PHP 7.2 and Xdebug 2.6 installed
When I start a debug session via browser, everything works fine. I can step through all my code perfectly.
But when I start a remote debug session inside VM via
XDEBUG_CONFIG="remote_host=10.10.0.1" PHP_IDE_CONFIG="serverName=abc" bin/console <command>
The Xdebug works also but it misses the lines in my local source code. In IntelliJ I am always one line ahead as the debugger seems to be. I can see it when for example a new variable is created in my local source code. Just one step later the debugger info shows me, that it was created. Another example: if I step over a code line I am suddenly on an empty line.
If I set the breakpoint as follows
$a = "abc";
o echo $a;
echo "test";
The debugger stops, but $a isn't initialized yet (as seen in the variables section). If I now step over
$a = "abc";
echo $a;
o
echo "test";
$a is initialized now, but not outputted by the echo command and the debugger is on an empty line.
Next step over leads to
$a = "abc";
echo $a;
echo "test";
o
and so on ...
The only tip I can find is: Check the path mapping. I am sure, the path mapping is really okay because it actually finds all the files I want to debug but it stops on the wrong line.
I also compared the files in my vagrant source code and my local source code. They are exactly the same. I think they cannot be out of sync cause the source code is shared with the VM via shared folder.
I also looked into Xdebug log file which tells me line numbers. These line numbers are exactly the same as in my local code, so nothing unusual here.
Strange is: The bin/console php file works correct, but classes instantiated from here does not.
Does somebody has a clue, what I can check else? Is there a known bug or anything else? Its no option to debug all my command line executed code via die() and print() commands ...