For future reference; friendly Dell employee Abhaas did send me this guide via private messages: [URL] I did the following 3 things in parralel. Do not know what fixed it but I am now two days without a single crash in sleep mode. Switched off the activation timers in energy management.Downloaded a radeon (my cpu and onboard graphics is from AMD) driver that did not appear to be in the xml driver list export off the dell update app.Did the Refresh hiberfil.sys File  off the Dell guide.  
Dear all, My inspiron 5505 laptop has the "not that nice" feature of crashing and rebooting when it is in sleep. This always happens if the laptop is in sleep for more than a few minutes. When this happend in windows 10 the computer restarts randomly and obviously any open windows are lost. When i upgraded to windows 11 today this issue persists, but with the additional issue of the Qualcomm QCA61x4A bluetooth / wifi adapter switching to bluetooth only, hence no possiblilty to connect to wifi. I also flagged this issue in the microsoft community, but to no avail. It is very cumbersome to reboot and do a shut down restart cycle every time this sleep no wifi happens. Did update drivers using dell update, also ran support assist (and prior times as well). previously my computer has been sent to Dell for this issue. I used my laptop as if out of the box, so with the default windows shipped by Dell prior to upgrading to windows 11. After that i did only change power plans and device manager as described at microsoft. Any idea / help to stop my inspiron 5505 from crashing in sleep?  
Dell inspiron 5505 crashes when in sleep Windows 10 & 11