LUCI Error after upgrade to r10949 or r10951: /etc/config/luci seems to be corrupt

Hi, I got this error, too, right after making the upgrade from 19.07.1 to 19.07.2 on the O2 box 6431.
It disappears after making a restart, but can appear again, I wasn't able to reproduce though.
Then I made a custom compile with additional packages (release 19.07.2), but even after doing 'make dirclean && make clean' before compiling, this also happened right after flashing. Is there something in the config files that can produce this error?
I have these packages included:

  • htop
  • luci
  • luci-app-banip
  • luci-app-ddns
  • luci-app-diag-core
  • luci-app-sqm
  • luci-app-ntpc
  • luci-app-watchcat
  • luci-app-wifischedule
  • luci-app-wol
  • luci-app-statistics
  • luci-compat
  • curl
  • wget
  • openssh-sftp-server
  • 6in4
  • netperf
  • nano

greetings