Wrong SF on response(downlink) with ADR temporarily off?

Hi, we are on v3 in EU868 and started to see an issue when the node changes temporarily SF7->S12 due to App Clock Sync that disables ADR. Uplink with Time Request is sent with SF12. However, Network Server schedules Downlink with SF7, and as an effect, it is not recognized by the node in its RX windows. Both node and application profiles are RP002-1.0.3. No rx_offset is configured in the network server toml.( as per Downlink Spreading Factor Gateway Config - #3 by James_W). Issue was reproduced with basicstation corecell type GW stack as well as with Semtech Forwarder and Tektelic Kona Enterprise Gateway.

Would I be missing something obvious here?

relevant screenshots below.