@zskii that's disappointing :( I hoped to get 0 replies about the 5300M. This because I couldn't crash a system with this video card in it. Are you sure you are getting exactly the same kernel panic? This part seems to be the same for all, including the same off: value of 1672.  [kext.kalloc.2048]: element modified after free (off:1672,

Been to the Apple Store today. Unfortunately no 5500M equipped MacBook available, even though I explicitly asked for that by phone before going there. Also tried the LG monitor they had in store. Was not able to even get the "sleep" issue with that one, not on USB-C nor on DisplayPort. So it seems to be the combination of the dell monitor and the 5500M. Apple Support should call me back tomorrow again. Not sure if the people with docks that experience this issue are also using dell monitors.

@scarvalhojr my test in the support center was with my dell monitor, I brought it with me. i saw the same “sleep” issue with that macbook, but it always crashes when that happens on my mac, even in recovery mode, but it didn’t crash their mac. I was sure I would crash their mac as well… so then I thought, what else is different. must be the videocard. with all replies in here so far I’m getting more confident that it’s related to the 5500M.

@scarvalhojr yes, only with DP it crashes. and the crash only happens after the display first has the “sleep problem”: the display is detected but does not get a signal from the laptop (you can see the display in the displays setting). after that, turning it off and on again results in the crash. but you seem to be right, all have a AMD. So I’m lost why the 2019 model at the support center didn’t crash :( Then perhaps it’s related to the upgrade 5500M, and not the base model 5300M. At least, I have the 5500M, the center had the cheapest macs so the 5300M, of the 5600M I don’t know if that one is also affected since that’s also an option according to https://support.apple.com/kb/SP809?locale=en_US