Well, I've been having some issue with my OPi5+ and I managed to solve most of them so far.
As to the issue at hand, I've been running with Armbian 24.2.1 Bookworm with Linux 5.10.160-legacy-rk35xx for a while on my 16GB no worries.
As for the 32GB, I can't say for Armbian as I haven't tested. But with J-R's, my booting issues and memory issues went away when I replaced my PSU.
It seems the 32GB needs a little more power than the 16GB, I replaced it with a proper 5v 6A PSU and all my worries went away, it boots and hasn't crashed yet !
It might work with an original 5v 5A, but mine was from Ali and might be over-rated as most is on this site ...
Hope this might help someone...
All my OPi5+ (16+32) are installed with a Force MP600 2tB Nvme
Pierre C. got a reaction from Werner in OPI5Plus - 32GB version issue