We recently had an automatic update apply to our in-house MX100 device. We have a number of non-meraki VPN's, to ASA's, ISR's and another Meraki MX in another organization.
When the firmware upgrade went through these stopped working. A support ticket indicated that certain fields in teh dashboard had moved or filled in others with the incorrect information. This is worring to be sure
The resolution was either
1. revert the Firmware
2. re-enter the PSK's on the tunnels. In one case we had to also add a Peer ID before it would work.
We are on 15.33 on our MX, we went MX 15.25 → MX 15.33