TSVB doesn't save the visualization configuration

[markov00]

Kibana version:
master

Browser version:
chrome

Describe the bug:
Saving a visualization created in TSVB doesn't save correctly it's configuration. It saves always an default chart.

Steps to reproduce:

1. Create a TSVB visualization
2. Change the title of the series or split the series by a term aggregation
3. Save the visualization
4. After clicking save, sometimes page refresh with a default visualization, some times no.
5. When opening the visualization from a dashboard the visualization displayed is the default TSVB one

Expected behavior:
When saving and reopening a visualization it should be saved with all the changes applied.

Screenshots (if relevant):

Errors in browser console (if relevant):
none

Provide logs and/or server output (if relevant):
n/a

Any additional context:
Independently from the configuration applied to the visualization, the saved object is always the default one, with a single series, named Count, with no aggregation or different configurations

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[timroes]

Caused by #48744

[exekias]

Is this fixed in master? I'm seeing this behavior for the interval configuration from Panel options

[timroes]

@exekias This is currently not fixed in master.