krunner doesn't find some files

I have installed kubuntu 19.10 and krunner doesn't find many files, however baloosearch find these files as expected. And of course I have enabled the desktop search in the settings of plasma search.

By example: I have a folder plenty of PDFs and MDs (markdown) files located in a mounted disk (this disk is mounted automatically at the start). Then making a search in the console using the baloosearch command I can find any file there (I put some words or string of the name of a file and then the location and complete name of the file appear almost instantly) however writting the same words or the complete name of a file in krunner then for some files (specially the new ones) they doesn't appear except in the case that I used it recently.

My plasmashell version is 5.16.5. I added the section of plugins in the configuration file, as has been asked in a comment:

[Plugins]
CharacterRunnerEnabled=false
DictionaryEnabled=false
Kill RunnerEnabled=true
PIM Contacts Search RunnerEnabled=false
PowerDevilEnabled=false
Spell CheckerEnabled=false
baloosearchEnabled=true
bookmarksEnabled=false
browsertabsEnabled=false
calculatorEnabled=true
desktopsessionsEnabled=false
katesessionsEnabled=false
konsoleprofilesEnabled=false
krunner_appstreamEnabled=false
kwinEnabled=false
locationsEnabled=true
org.kde.activitiesEnabled=true
org.kde.datetimeEnabled=false
org.kde.windowedwidgetsEnabled=false
placesEnabled=true
plasma-desktopEnabled=false
recentdocumentsEnabled=true
servicesEnabled=true
shellEnabled=true
unitconverterEnabled=true
webshortcutsEnabled=true
windowsEnabled=false

However nothing unusual or strange is here. I tried enabling everything and restarting but nothing changes.

The output of ls -l ~/.config/krunnerrc is

-rw------- 1 user user 7236 abr 16 04:08 /home/user/.config/krunnerrc

Someone knows how to fix this behavior?