I solved issue based v8dave recommendation, - created many HTTP receiver datasources and whitelisted devices, but I think that this is not valid solution, because datapoint has Device name field, and it looks that it has no use - data from request is not filtered based on this field.

I just expected that Device name field should work as device identifier for data point.
(?) icon says nothing about that field in point definition.

My intial config was:
One HTTP data source > 16 Points from all devices , with Device name set on point.

Current config:
8 data sources with Whitelisted devices > 2 points per device, with related parameters

I got the same problem - created 8 copies of data point in one HTTP receiver Data source, and all those points updates together after any HTTP receiver incoming message.
All XID's are different.
Device names in point definition are different
Parameter names are the same for all points.

Is this a bug, or different approach is required for multiple datapoints in one source?
I can share json for those points/source.