Type Ibn R/r-band template lightcurve from Hosseinzadeh et al. (2017), with overplotted the r-band lightcurve of SN 2020bqj (in black) and the R/r/I-band lightcurves of the slow evolving and/or double-peaked SNe Ibn OGLE-2014-SN-131 (yellow), SN 2011hw (blue), iPTF13beo (orange) and SN 2005la (purple). Also shown is PTF11rfr (turquoise), a rapidly rising SN IIn with a peak plateau, but a slow decline (see Nyholm et al. 2020). The latest pre-discovery upper limits, where available, are indicated by triangles. While normal Type Ibn SNe have declined ∼4 mag 35−40 days after peak, SN 2020bqj stayed constant in brightness during the same period. SN 2011hw shows a similar lightcurve evolution, albeit one magnitude fainter. Phase is days in rest-frame since estimated explosion epoch for SN 2020bqj, SN 2011hw, iPTF13beo. The phases of SN 2005la, OGLE-2014-SN-131 and PTF11rfr are relative to their last non-detections, although for the two SNe Ibn these observations were rather shallow. The phase of the Type Ibn template is relative to the start of the template at 8 days before peak.