If you check in (from the root of the phone drive when you connect to the computer).
/ Android / data / com.parrot.freeflight6 / files / logs
Hopefully there will be a long list of files in there, using the file creation you should be able to locate the one for that flight in question. The filenames are a random UID, so will not relate to anything.
They are a compressed json file - decompress and use a json parser to format it nicely.
Sadly there are no useable readers yet for this format, so you will have to parse it manually to determine cause of autoland.
I suspect you will find that battery voltage dipped below ~6800mV briefly causing the autoland to trigger.
