Extra line feeds in some places, not evident with "official" driver.

[sleemanj]

I purchases a ZJ-58 printer from Aliexpress a while ago and used this driver with it, I noticed some odd "extra blank lines" inserted into the output.

After trying with the linux driver supplied with the printer, which is according to the header written by "Shenzhen ZiJiang Electronics Co..Ltd " I notice that these extra blank lines do not appear when using that driver.

The image below shows two prints, same printer, same file, both printed from Chrome, one after the other, only difference one on the left uses this (@klirichek) driver, and the one on the right uses the "official" one.

You can see there are two problems, of a similar nature, firstly the photo at the top has part of it "sliced" with extra blank lines at the top and bottom area of the photo. And there are extra blank lines (extra "line height") in the text.

The HTML file in this attached ZIP, when printed using Chrome shows the odd behaviour generally.

html-to-print.zip

I've attached the ppd and rasterizer from the "official" driver extracted from the installer, if you want the installer itself let me know
pack.tar.gz

[diggy128]

Exactly the same thing here.
Is there any way to fix this because unfortunately it makes the driver barely usable when you need x2 the paper.