This could be a ugwz star, just like asassn-21qg probably is ... 

;-)

Berto Monard / KKO

On Tue, Aug 31, 2021 at 5:20 AM Taichi Kato <tkato@kusastro.kyoto-u.ac.jp> wrote:
Gaia21dzx

   Most likely a large-amplitude dwarf nova.

http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21dzx/
Gaia21dzx       AT2021xgr       2021-08-26 21:58:43     286.00866       -35.39330       15.00                   unknown 2021-08-30 23:17:11     apparently hostless transient

190402.108 -352336.26 (2000.0) GALEX_DR5_6383934048320887191 NUV=20.335(0.149) FUV=19.657(0.107)