Steps to reproduce:
- install any 5.0/5.4+ version with
ZBXNEXT-6503with proxy (passive/active)
- reduce history cache
- break connectivity for proxy for some time to get queue
- check last seen field for proxy on the server side - it will show minutes of delay, even if the queue reduces when sql used to check proxy backlog
Last seen field should be updated even if throttling is done, since where is internal items what will fire up trigger about proxy availability and it's confusing.