The red circles represent also locations of micro lensed objects and the microlens itself. Could both represent ROGUE PLanets? or one of the micro black hole based former Starspots expelled by the Nova.?
see: https://earthsky.org/space/rogue-planets-exoplanets-nancy-grace-roman-space-telescope/
New Study Reveals NASA’s Roman Could Find 400 Earth-Mass Rogue Planets
https://www.nasa.gov/missions/roman-space-telescope/new-study-reveals-nasas-roman-could-find-400-earth-mass-rogue-planets/
(Super) Novas and the resulting Starspots based Micro Black Hole related Herbig Haro systems creating Rogue stars and flyffy Gas globules.
Binary fractions of Micro Herbig Haro systems in starfields creating Jumbos and even Rogue Planets.
Trapped Space collision of vacuum Axions creating Plasma around all Black Holes even Starspots or Ball Lightning. Dual Black hole with equal size (LIGO/VIRGO) create Herbig Haro star forming systems.
