Dear Ken,
thanks for your reply and the explanation - makes sense.
To answer your question: No, yourphone.exe does not change every day, rather once every one or two weeks. However, it’s not the only .exe with thie described behaviour. There are several more like
microsoft.sharepoint.exe
lenovo.modern.imcontroller.pluginhost.settingsapp.exe
lenovo.vantage.addinhost.x86.exe
lenovovantageservice.exe
lenovovantage.exe
officeclicktorun.exe
hxtsr.exe
microsoft.sharepoint.exe
microsoft.photos.exe
miro.exe
officeclicktorun.exe
gamebar.exe
winstore.app.exe
slack.exe
skype.exe
They all come back from time to time with yourphone.exe and filecoauth.exe beeing the most frequent.
I’m not an expert - as my earlier post clearly shows 
However, there must be a solution to this.
Best regards
Henry