Vega's filter bar is not usable with non default index pattern

[Dosant]

Kibana version: 7.7, 7.6, 7.5,.. (probably some other 7.x). Works in 6.8
Browser version: Chrome
Describe the bug:

Filter bar in Vega is not usable with non default index pattern.

• Suggestions are from the wrong index.
• After applying correct custom filter 7.7, 7.6:

in 7.6 query bar silently crashes and disappears:

in 7.7 it is nicer query bar adds "error" state to filter:

in 6.8 that worked.

Expected behavior:

Probably we should pick index pattern?
Or at least have some mode in filter manager which doesn't require index pattern?

[elasticmachine]

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

[Dosant]

Similar issue but specific to "addFilter" integration: #56833