Event filter and load balancing (HTTPS RPC)

Iā€™m currently evaluating different node as a service providers for my new project (initially launching on avalanche, eventually extending to Fantom and others).
Iā€™m played around with your Speedy Nodes RPC endpoints a
nd noticed that the RPC calls eth_newFilter and subsequent eth_getFilterChanges are not load load-balancer to the same node instance, resulting in ā€œfilterId not found issuesā€.
Some other node provider solve this by loadbalancing via cookies but based on my test Moralis doesnā€™t seem to support this.
Is there a way how I can use this methods via HTTPS? They do work on WebSockets but for some use-case I require HTTPS support.

Thanks for your help!

I know that on http you can get a random node. And that on websocket you connect to same node.

If you find another better node provider better to use that one as we donā€™t intend to provide nodes long term.