The selected theme is not retained when importing a site template from another site template

Issue

• Since the radio option is missing, importing a site template from another template does not maintain the selected theme.
• Steps to reproduce
  1) Navigate to Control Panel > Sites > Site Templates
  2) Add a site template
  3) Open the site template created in step 2
  4) Navigate to Site Builder > Pages > Configure (Gear button)> Pages: Look and Feel
  5) Click 'Change Current Theme' and select a theme other than the default one
  6) Navigate to Publishing > Export
  7) Export the site template ('Theme Settings' is checked) and download it
  8) Navigate back to Control Panel > Sites > Site Templates
  9) Add a site template
  10)Open the site template created in step 9
  11)Navigate to Publishing > Import
  12)Notice that there are missing radio options compared to importing a Site (Theme Reference Option Missing)
  13)Import the site template exported in step 7
  14)Navigate to Site Builder > Pages > Configure (Gear button)> Pages: Look and Feel
  15)Check the theme setting
  Observed Behavior: The default theme (Classic theme) is selected.
  Expected Behavior: Specified theme in step 5 is selected.

Environment

• Liferay DXP 7.2
• Liferay DXP 7.3
• Liferay DXP 7.4

Resolution

• The observed behavior is a known issue addressed by LPS-143170, that is already included in Liferay dxp U1.

Additional Information

• If a hotfix is required, please create a support ticket requesting the hotfix by attaching the patch details.
• Installing Fix Packs and Hotfixes on Liferay DXP will guide you to install the Fixpack/Hotfix in your environment.