asset_properties and cache warm up

[bytes_intravenously]

It's quite convenient that the inventory response now includes asset_properties.

 

assets (100)
descriptions (92)
asset_properties (98)
more_items 1
last_assetid "44889606861"
total_inventory_count 983
success 1
rwgrsn-2

However, for huge inventories, Steam doesn't include them in the response, their cache needs to be warmed up. This is bad because for an inventory of 999 items, you need to make as many as 5 requests along the chain count=75->150->300->600->1000 . Whereas Steam does this in 2 requests:

https://steamcommunity.com/inventory/_/730/2?l=en&count=75&preserve_bbcode=1&raw_asset_properties=1

https://steamcommunity.com/inventory/_/730/2?l=en&count=2000&preserve_bbcode=1&raw_asset_properties=1&start_assetid=44889606861

Any attempts to repeat the process with count=2000 on the second request don't give me a result with asset_properties. Same cookies, same delay, same headers

Any thoughts?