NAS loses configuration on MinimServer Restart from MinimWatch

[clAudio]

First of all, I want to say that I have been using MinimServer for a couple of years and I’m very satisfied about it

I have one issue, maybe it’s caused by my NAS, not MinimServer:
After a restart my QNAP TS-109 II always loses the configuration (as opposed to my TS 259 Pro+).

Today I tried to find the cause, without success:

I decide to take a look at the minimserver.config file and its access rights in /share/HDA_DATA/.qpkg/MinimServer/data.
To my surprise I can only find the minimserver.config.lock file there (while MinimServer is running), but there is no minimserver.config.

I open the MinimWatch Properties dialog (with the settings in effect, which I had made earlier) and click Apply. After that there is still no minimserver.config.

I stop MinimServer from MinimWatch and create minimserver.config in /share/HDA_DATA/.qpkg/MinimServer/data using the following commands:
echo "minimserver.contentDir = /share/Qmultimedia/Music" > minimserver.config
echo "minimserver.displayName = MinimServer [NAS1]" >> minimserver.config
etc.,
with all the values that I usually enter in the MinimWatch Properties dialog.

I use
more minimserver.config
to verify the content of the file.

After restarting MinimServer from MinimWatch the minimserver.config file is gone again. Only the minimserver.config.lock file is there.

Is there anything I can do about this NAS not keeping the MinimServer configuration?

QNAP Firmware 2.1.0 Build 0904T

Version information from QPKG:
JRE_ARM 8.0.0
NPTL 0.20
MinimServer 0.8.1.1

Version information from MinimWatch:
MinimServer 0.8.1 update 31.