Record Timer deceasing?

The Max record timer on the bottom of the page keeps decreasing as I continue with the project. I was wondering whether this is related to available memory and if the project is finished whether this memory i.e. max record timer will fill up again and not stay where it has decreased to?


From the manual,

Record Time Max display
The Record Time Max display lets you see how much time you have left for recording. The available time depends on the current setup, for example, on the amount of tracks that are record-enabled, your project setup (e. g. the sample rate), and the amount of hard disk space available. You can show and hide the display using the “Record Time Max” option on the Devices menu.
The remaining record time is also shown in the status line above the track list.