Dell Precision 7780 BTX boot issues after Windows 11 updates

I only purchased this machine a few months ago but have had two major incidents with updates already. The last one happened yesterday with a longish Windows 11 update. Once the update was complete, the machine rebooted but was in 'manufacturer mode' with the fan whirling at maximum speed and the service tag removed from the Bios completely. Fortunately, I figured out how to rectify this but it got me thinking about what would happen with someone who isn't as clued up as me? This is a really bad customer experience and I feel very disappointed with Dell. I thought the first incident that happened after a Dell Bios update was an isolated one, but when it happened again after a Windows 11 update, I'm beginning to think there is something that Dell hasn't picked up on here. This needs to be addressed urgently and I am now considering buying from another company in the future as Dells customer experience is really poor.