Hi,
I've noticed this as well. In our scenario, a re-audit date was constrained to within 2 months of the audit date:
My constraint field is called ${DueDate}, is based off of the AuditDate field (default is today()) and is set to:
.>date(${AuditDate}) and . <date(${AuditDate}+ (60.88*24*60*60*1000))
The constraint worked perfectly in Survey123 Connect & Survey123 1.6.11 but not in 1.7.35/1.7.20.