The md5sum of what is current installed and working is: 5740378bfc048108341a204b83ca97c7 /lib/firmware/intel/ibt-17-16-1.sfi
Which is the same md5sum as the rel0472 version you link to above, so yes, that does seem to be working.
I've downloaded the rel0450 version now, I'll install it, and leave my computer off for at least 5 minutes this time, and see what happens...
The md5sum of what is current installed and working is: 8341a204b83ca97 c7 /lib/firmware/ intel/ibt- 17-16-1. sfi
5740378bfc04810
Which is the same md5sum as the rel0472 version you link to above, so yes, that does seem to be working.
I've downloaded the rel0450 version now, I'll install it, and leave my computer off for at least 5 minutes this time, and see what happens...