Me and my faction have built several cannons for differant raids and they all seem to be glitchy and dont even throw sand correctly and those same cannons work perfectly fine on other servers and on singleplayer.
use /f raid claim (10) is max and put them there if you want to test them. Therefore, if the same thing happens you can also make a bug report on the reports section (Sub-Forum Bug Reports) and explain it there.
Or check if the cannon is well made by your schematica or what printing mod you are using. If you use schematica it is easy to see the items you need for it and it also auto tells you in a status image of what you missing.
For example, Repeaters 10/11 means you are missing a repeater somewhere and you need to find it.
If none of this works out for the aims you got it means that Jartex.Jar is different of other people so you must look out for another cannon