Delfi explains the need to re-flash all over again, with apologies...
Quote...for the new 6.5 images made after 14.3 it is very likely that a re-flahs is needed.
Sorry about that , but new version of compiler and some other stuff happened and there is probably more than 90% that is different. In some strange, ideal world, a simple SW update should be OK, but not likely... :(
However strange it looks, it is NOT our intention to torture users... :)
New C compiler DOES fix a lot of problems for ARM (well, OK... in some cases... :) )
So, anything after 14. 3. 2020 - flash it again, from scratch...
I suppose, restoring settings is a viable option, which makes the whole procedure some 10 minute job, with plugins restored as well...
Good luck!