There are situations when back-and-forth doesn't provide the expected return traffic: when there is a source and destination filters, and the destination is comprised within the source (or vice-versa):

• Clear all filters
• Set a source owner name filter, e.g. "flowlogs-pipeline"
• Set a destination namespace that includes that source, e.g. "netobserv"
• Enable BnF

=> you don't get the returned traffic, e.g. from Loki to FLP. Note that if you click on "swap" filters, you see the expected returned traffic.