Version
1.7.7
Environment
"ant-design-vue": "1.7.8", "moment": "2.22.1", "vue": "2.5.17"
Reproduction link

Steps to reproduce

选中日期范围(2021-11-05 ~ 2021-11-06), 点开选择器, 手动修改第二个日期为2021-11-07, 回车
What is expected?
日期范围为2021-11-05 ~ 2021-11-07
What is actually happening?
日期范围为2021-11-05 ~ 2021-12-07
两个都选12月的话会跨年