Camera card setup

I've got several Amcrest cameras connected through Frigate (running standalone) to HA but I'm not sure how to properly setup the camera card so that the 'thumbnail' shown on the dashboard cards refreshes every so often.

Previously I had them connected directly to HA via the Dahua integration and set the camera streams as both the thumbnail image and as what's displayed when you click the card and this all worked fairly well (the thumbnail would refresh every few minutes) but now after switching to Frigate, the thumbnails have remained static since the day it was initially set up and never refresh and I'm not sure how to fix this.

The cameras are all PoE and connected to an Amcrest NVR which does the main recording while Frigate just sees the substream and uses it for object detection and remote viewing through HA. Clicking the camera cards allows me to view the stream but for whatever reason the thumbnails never refresh.