Tunnel auto deletion / expiry rules

[paver]

Hi,

I've been a user of the service for a year or two now and noticed that my tunnel had recently been deleted (within the past 2 weeks or so).

Could it be because I'd not updated my IP there for some time? I have a script running on my Mikrotik which will auto update the tunnel when my public ipv4 changes, but it hasn't for some time.

What is the official policy on inactivity & deletion?

Thanks