When fetching about 100 RSS feeds in a few seconds, the following error is sent 2-10 times:

ERROR fatal.nim(54)            sysFatal
asyncfutures.nim(389)    read
asyncfutures.nim(389)    read
asyncfutures.nim(389)    read
index 0 not in 1 .. 12

I set tokenCount = 10, redisMaxConnections = 200 and rssMinutes = 0.
Most requests resolve successfully though. Does anyone know what is causing this / how to fix it? Thanks!