Take a look at this link, because SuiteCRM does have this bug.
https://web.sugarcrm.com/support/issues/ed1f31a6-cb2d-12d1-5d15-52b399203902
For my purposes, I’m rolling back to Sugar 6.5.13, the last Sugar that I know of that does not have this bug.
Sadly, I will have to present with 6.5.13.
When you fix this, let me know. I would prefer to go to production with your product and this fixed.