[bewaretheirs]

It's more likely that something energetic happened with an onboard system (propulsion or batteries). Could just be leaky valves causing propellant and oxidizer to meet somewhere they shouldn't..

It's had a few propulsion system issues:

> On 9 September 2016, Intelsat announced that due to a malfunction in the LEROS-1c primary thruster, it would require more time for orbit rising ...

> In August 2017, another propulsion issue appeared, leading to larger-than-expected propellant usage to control the satellite attitude during the north/south station keeping maneuvers. This issue reduced the orbital life-time by about 3.5 years.

https://en.wikipedia.org/wiki/Intelsat_33e