memory recollection fragmentation 

Only being able to remember particular fragments of memories or ideas from an earlier time where the context of such memories are no longer recoverable.

I had a really good idea last night, but can't seem to remember what it is. It must be a bad case of memory recollection fragmentation.

The guy has a really bad case of memory recollection fragmentation. It took all month to engineer the tissue to CPU membrane but forgot a critical step.

Old age produces memory recollection fragmentation. Most of our patients have trouble integrating life's memories into a coherent timeline.

memory recollection fragmentation by Ontological June 25, 2018