I had a different issue, more serious where all IP connectivity just stopped, luckily I had a LOM. It was strange because the jumbo installed ok, and was all working fine for a good few days. I then had to make another change which required the device to be rebooted.
After the reboot I could no longer access the device. I jumped on LOM and all the configuration was there. I checked arp and there where no arp entries, its like the routed process just stopped.
I firstly revert the change I made and rebooted (note: JHFA131 no uninstalled at the point), and this did not make a difference.
I then uninstalled JHFA131 and then everything was working again. I then installed JHFA125 and made the specific change and everything was all good.
The issue was reported to TAC via an pre-existing case and in typical TAC fashion ask why I did not install the GA release as its not recommended to install the ongoing JHFA (far enough), but they did not investigate the issue which would have been helpful to stabilise JHFA131 going forward.
I did report it here as well and I believe the Team responsible for Jumbo may be taking a look at the files I uploaded to the pre-existing case.