I have the DT swiss X1800 and have had a similar mysterious deflation which i’ve now cured.
on mine it turned out to be air leaking out of some of the spoke holes!!
even though i had sealed mine with tape somehow air was still leaking and the sealant wasnt stoping it.
I’m not sure exactly why but sometimes theres an area of the rim/spoke/tyre/tape etc that sealant doesnt want to stick too which causes a leak (maybe a patch contaminted whith oil)
I scrubbed my wheels/tyres/strips with detergeant and tried again and no leaks since
i’ve used racing ralphs on my wheels sucesfully and they seal well after a leaving standing on a bucket both sides etc, so rons should work
put blobs of sealant on all your spoke nipples and see if they bubble with air