Sad to report that v18.15 crashed for me at the starting gun on a 5km race.
I spent a good few seconds waiting for the watch to reboot, and then find the "workout" that I had created for the race power plan.
Really not cool, Garmin.
I've not seen this menitoned in any release notes since v18.15, so I assume it's still an issue.
Also, I requested to get off the beta program, but I've been stuck on 18.15 until I manually checked for a new version just now.
Please contact me to work out why this happened, so others don't have this terrible experience.