Issue with plotting when first data frame has gaps

Hi,

I’m getting following graph


when first data frame has gaps (ie. value is defined for 01.01.2021, ten for 03.01.2021)

My data frames:
First:
“timestamp”,“Cases countries/1”
2020-03-09 01:00:00,5
2020-03-11 01:00:00,5
2020-03-12 01:00:00,9

Second:
“timestamp”,“Cases countries/1”
2020-03-09 01:00:00,5
2020-03-10 01:00:00,6
2020-03-11 01:00:00,5
2020-03-12 01:00:00,9

Is it bug/feature?

Answered here ^