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LR1110 GNSS unwanted emission

Hi,

I'm working on a project equipped with LR1110. I noticed that if I place GNSS antenna close to the chip, there is an influence on a receiver performance.
I did few test with my PCB and development kit connected to patch antenna under open sky. When the antenna is moved away by 30 cm I can see 10-12 satellites, when I move it closer to the chip number of satellites decreases to 4-6.
I checked also the emission using near field probes, I can see a peak at 1575MHz appears when chip listen for satellites.
Do I need additional shielding? Maybe there are additional schematic or layout considerations?

Regards,
Grzegorz