Every reboot increases the number of "proc" entries in /etc/fstab.
Confirmed as an issue, please see Multiple Procfs Problem
for more details.
The reason therefor, I think, relies on a part of /etc/inc/config.inc
beginning at line 210 until line 212.
I commented it out for a test, and no more additional entries were created.
There is no check, whether or not, an entry for proc already exists in fstab.