Live stram logs in Loki is swallowing loglines

I am running Loki v.2.4 on multi-nodes in read and write sides, by putting the Ingester and Distributor on one side and querier, query frontend, and ruler on another side. We noticed lately that when we search for logs on Grafana using the Live stream mode, it swallows significant loglines data compared with the normal searching mode of logs. Does anybody have encountered this? or have an idea of what could be the reason and how to fix it possibly?