I have several large collections of requests.
Often, when I click on a request in the left nav, it “opens” in the main area to the right, but does not load the request, it just pulses a blank screen, eventually saying “request not found”. The workaround is to close postman and open it, then miraculously my request is found again. It is random, sometimes I can open requests, sometimes not.
I have to restart postman 10+ times a day. It has been like this for as long as I can remember.
All my collections are local (not shared).
I keep postman up to date.
It is worth noting that my network is absolutely solid - wired gigabit uncontended fibre. I frequently have database connections open to remote servers, and never loose or drop them, so I dont think its an internet or network issue.