Time series: Connect null values not working when stacking line charts from two queries

### What happened? I have two query A and B in Grafana dashboard panel, query A data is before current time and query B data is after current time. I want to have solid line for A data and dash line for B data with stacking for Type columns. I have tried to do this with connect null values = Never, but it does not seem to work. Below is the chart I have currently when I have stack = normal   ### What did you expect to happen? I want to have the chart like below but with stack = normal   The connect null values= Never, Always does not change and we want to have the charts stacked. Can you please let me know if there is any other way to achieve this. ### Did this work before? No ### How do we reproduce it? 1. Have query A and B with different time range 2. Plot the time series charts with stack = Normal 3. Observe how the two queries join at the end of query A and start of query B ### Is the bug inside a dashboard panel? _No response_ ### Environment (with versions)? Grafana: OS: Browser: ### Grafana platform? None ### Datasource(s)? TrinoRouter, SlomanDB