Position of subtitle tracks not consistent when there is time gap in the 2nd track

[teristam]

What is the issue and what do you do to make it happen
When two subtitle tracks are shown in Netflix, the first subtitle track drops down to the bottom when there is a time gap in the second track. This makes the first subtitle jumping up and down and becomes very distracting.

Currently there is no way to configure the offset of different subtitle track separately. Only the alignment can be changed.
It will be great if there is a way to fix the vertical position of each subtitle track, regardless of what the other tracks are showing.

Example:

What browser?
Edge

Is it happening with local video or streaming video?
Streaming video.

If the issue is happening with streaming video, what version of the extension are you using?
1.8.0

If the issue is happening with streaming video, on what website(s) is the issue happening?