As a complex hybrid, I imagine the blooming period may be a bit varied. This hybrid looks to be registered by Akerne orchids, and orchidroots says it's about 50% kingianum, which I believe can bloom late winter (
Dendrobium Patricia Van Puyenbroeck).
Since these types of dens are usually from Australia, you'd actually be in late winter/spring now according to their seasons, though I imagine this plant was cultivated in the northern hemisphere this year if you've had it yourself for several months.
Perhaps it's still operating on it's southern hemisphere cycle lol. Did you buy it from Akerne in Belgium by any chance? They are only an hour from me.