If Firefox VPN is on for too long, it dies AND all sites become inaccessible

(Just to confirm: Yes, I'm talking about Firefox VPN, not Mozilla VPN) Sometimes, I need to let my computer run for a while without using it. This often means that I'll have Firefox open for hours at a time without anything happening. I've noticed that almost every time after I come back to my computer after hours of inactivity with Firefox VPN turned on, I get the "Secure connection failed" error on EVERY website I try to access, including sites where I specifically disabled VPN for them. If I try to turn off and turn on Firefox VPN, it fails to turn itself back on after five minutes of waiting. So when I restart Firefox, it's turned off, which is inconvenient since I have pinned tabs which I want the VPN turned on for. And if I restart Firefox (with or without restarting the computer itself) without doing anything to Firefox VPN, which means the Firefox VPN is still ostensibly turned on when Firefox is shut down, then when Firefox opens again, Firefox VPN is... turned off. This is not the expected behavior, because if I restart Firefox with the VPN turned on without having had any site loading issues, then the VPN is still on when Firefox opens again. Since Firefox VPN otherwise works fine for me, I'm just restarting Firefox more often now. But I feel like this isn't supposed to happen.