logstash-input-redis can lose data 

In `redis-cli monitor` I see this calls:
```
1547818504.509313 [0 lua] "lrange" "filebeat" "0" "124"
1547818504.509476 [0 lua] "ltrim" "filebeat" "125" "-1"
```
Do I understand correctly, data which added between unix timestamp 1547818504.509313 and 1547818504.509476 will be just deleted?