Reduced ailment duration sometimes not working?

While I do understand that having reduced ailment duration doesn't actually make you ailment immune like less ailment duration would I've been running into an issue while playing tota.
While versing the one tribe who mostly does cold damage, with a firesong and 119% "reduced ignite duration on you" (aka 119% reduced all ailments duration) I'm sometimes getting frozen and that freeze is lasting for a whole 8-19 seconds at a time.
Am I not supposed to at least reduce the duration of the ailments I get inflicted if the skill that applies them has more then 119 increased duration or does the cold tota boss simply apply 30+ seconds freezes that get reduced to 19 seconds?

Possibly the enemies have increased freeze duration, possibly you're getting stunned instead

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PurpleChakra wrote:

Possibly the enemies have increased freeze duration, possibly you're getting stunned instead

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The debuff most definitely read "frozen solid".
As I said I do understand the only reason I'd get frozen is that their duration exceeds my duration reduction but how does it get to upwards of 19 seconds is what I was curious about.