New Container Size options in 3.17.1 not working

Container Size: just started to test this feature, i tested it on Joomla 3.10 and Joomla 4 using the latest Yootheme Pro, with UIKIT3 selected as my layout, also tested with Bootstrap 2 on Joomla 3.10 and nothing work to give me a grid like layout.

Form layout Stacked work great but nothing else, Do i need to update to Event Booking 3.17.4 for this to work?

Hello

Could you please submit a support ticket sending us super admin account of the site, link to the form and tell me what fields you setup the Container Size so that I can check the setup to see why it is not working?

Regards,

Tuan