File invalid after transfer via mtom

Hi!

I'm trying to transfer a html file with some long lines via SoapUI / Mtom. After transfering the file is invalid. The long lines are splittet. (We tried with open source SoapUI Version 5.2.1 and with the latest version 5.4.0)

Example:

line before transfering:

<link rel="colorSchemeMapping" href="https://www.mosaico.bonfiglioli.com/eGenius/eGeniushelp/MOSAICO/SERIEA/A050_file/colorschememapping.xml">

line after tranfering:

<link rel=3D"themeData" href=3D"https://www.mosaico.bonfiglioli.com/eGenius=
/eGeniushelp/MOSAICO/SERIEA/A050_file/themedata.thmx">

I Is there any possibility to avoid this behavior?

Thanks for your help!

Regards,

Hanna