This sounds an intriguing event, Tim. Thanks for flagging it.
I’m not familiar with RY CrB, so I looked it up.
The Variable Star Index lists it as a semi-regular variable with a range 8.8 to 10.0 in V band. The period is ~90 days.
There are no observations of it in the BAA VSS database. There are very few in AAVSO, the most recent being last August at 9.4 visual.
I wonder if the mag 6.7 you cite is an R mag. It is a red star of spectral type M8 to 10 so will appear bright at longer wavelengths as discussed in the R Lyr thread on the Forum.