Really hard to collect Bad Omen since update

Since the 1.15, and 1.15.1 update/s I am finding it very difficult to collect the Bad Omen effect. It is taking 4, or 8, or onwards of 10 'Patrol Leader' kills to finally collect the effect. Is this deliberate or by accident? Or am I the only one affected?
The first time it took 3 kills, the 2nd time it was 4 kills, then 8 kills, now I am currently sitting on 16 Patrol Lead kills with no effect happening.