Siteorigin editor breaks a picturgallery in a new line

Hello there,

i am using siteorigin editor and installed the siteorigin bundle. And I actually thought about the premium version, because it is a great plugin.
If I make an gallery for example of 3 pictures, only two are shown in one row and the third one is often (not always!) in the next row in every post! In the live editor everything is displayed correctly in one line.

Could you please have a look, what the problem could be?

my website: www.weltenbummler.guide
here is an example: http://weltenbummler.guide/asien/myanmar/golden-rock/

Thank so much,
Andre