See the paper by Tzanidakis and Davenport on Gaia20ehk / Gaia-GIC-1:
Gaia-GIC-1: An Evolving Catastrophic Planetesimal Collision Candidate
Highlights:
- significant dimming in visible lights with correspond brightening in infra red since ~2020
- since optical dimming: high amplitude variability
- before optical dimming: periodic modulation of 380.5 days in Gaia G
- The star is likely to be a YSO, belonging to open cluster FSR 1352 or FSR 1347
- The authors’ leading explanation is that the optical dimming + infra red brightening is due to dusty materials from a planetary collision.