Hi @niallr,
Not sure which AEM version you are using, however it looks that:
- on AEM 6.5 (on-premise/Managed Services) filters selection remain after page refresh
- on AEMaaCS/AEM Assets indeed page refresh removes the filters
I do not think this is something you could configure or control. I would suggest to raise an Idea via community, and hopefully this will be implemented in the future.