No, CSL has no limitation on the title length and would always print anything that's in the title field in Zotero (unless, of course, the style specifies the short title, in which case it uses the short title field).
Could be related to notes? If you cite a note, Zotero includes the first X (100?) characters as its title. But as dstillman says, more details woudl be helpful.
Could be related to notes? If you cite a note, Zotero includes the first X (100?) characters as its title. But as dstillman says, more details woudl be helpful.
https://www.zotero.org/support/reporting_problems#provide_steps_to_reproduce