Geomety error when using compose element

[JS4753]

Hey,

when creating a railing style, I came across an error when using the compose element. When there is no space left between the elements, there are strange geometry errors created. The elements don't fit to each other neatlessly. If I add some space in between, so that the elements don't touch each other, the errors disappear. Only that I don't want any space in between 

I attached two pics to illustrate the problem. I can't figure out wha that is. Looking forward to any help...

Greetings
Bettina5

[Rokas]

Hi, please attach a maxfile so we can check it.

[JS4753]

Hey,

can you give me an email-adress where I can send the file to?

Greetings

[Rokas]

Please send files to helpdesk@itoosoft.com.
The attachment size for this account is limited. For large files, please use a web sharing service as WeTransfer.

[JS4753]

Hey Rokas,

I just sent the max-file to the requested email-adress.

Greetings