Fractional beams should push notes away a little
"A picture is worth a 1000 words": The fractional beams in the following score end so near to the next stem that the gap is almost invisible:
The fractional beam should push away the next stem by (I'd say) at least half of its length.
To reproduce: Import MIDI from item https://musescore.org/en/node/334484; and look into measures 43 and following.
Workaround: Fiddle with the distance for each note that is too near.