Since 3 days ago, my dash app is crashing with R15 out of memory error, after reaching 512 MB memory usage (100% of free dyno). It was running for several months without any issues at 180%, and according to the documentation, free dynos support up to 1GB (200%) memory usage.
I haven't done any changes on my app, besides the daily update - it just suddenly stopped running. There was an incident reported to Heroku roughly at the same moment, which they closed, but the issue is not resolved for me.
Any ideas why is that happening?