Expense module not sticking within CRM

Expense module not sticking within CRM

Zoho Expense module is intermittently available as a module within CRM.  Integration seems unstable.  It works for a day, and then stops working until I disable and re-enable the integration.  We are using Zoho One and the Expense app is enabled although none of the other Finance suite apps are as we are not using them yet.  Anyone have any ideas?  Much appreciated!