CSV Export of Graph Data custom range exports wrong timespan

[jt555]

Using custom date & time range for a graph to export to CSV. The CSV is created with the time span of the browser's timezone.

example:
server is in UTC timezone.
browser on in EDT timezone.
select 2019-01-30 10:00 to 2019-01-30 12:00 for time span.
graph displays correct times.
export to CSV.
CSV times are 15:00 to 17:00.
EDT is UTC+5.
Any non-custom times work correctly.

It seems to be controlled by the browser's timezone. This does not happen on a browser that's also in UTC.

Is there a work-around for this?

I'm seeing this in 1.1.7 and 1.1.38.