Sniffers wait 7-8 minutes after they spawn before finding seeds

Upon spawning sniffers, it takes them a long time to see them actively scenting and finding the seeds. In Java Edition they dig up their first seed within a minute after spawning.

Step to Reproduce
1. Spawn some sniffers (on a large patch of grass due to MCPE-178301).
2. Let them find the seed.

Observed Result
They sniff and scent, but they aren't actively looking for the seeds for 7-8 minutes.

Expected Result
They should be actively looking for the seeds soon after spawning.