Frontend disconnect

I have 2 Kodi front-ends serviced by a backed. All 3 are running off Pi3s. What I’m noticing is that after some time has passed, I’ll go to play a recording from the recordings list and the “working” box will come up in the lower right hand corner, but it won’t play. Eventually it times out, or I can press “Stop” and it gives me control back in the menu. I will then be unable to play the show I just tried to play (selecting the show no longer brings up the “working” box). If I select another show (or live feed) it plays right away. I can then stop that show, select the one I wanted originally and it will now play immediately. My guess is that some kind of session timeout is occurring and the connection is being severed at the server level. All boxes are wired connections, and at least 1 frontend is on the same switch as the backend, so I do not believe it is network-related. I could not find any settings in the server configuration or user configuration related to session time limits.