I've tested this in a few scenarios. I'm not able to reproduce this, as I get a revolt against me as intended. A save game from before when this happens would be great. Also, you don't make it clear on who you are playing, your title state that you are playing as a Strategos (any specific one?), but most factions should be disabled against Viceroyalties. So what kind of faction is it that you get against you? Do you have any titles that are not Viceroyalties?
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In the future, in order to make our job easier (and thus more issues getting fixed!), please use these guidelines when writing bug reports in order to include as much information as possible.