EAD卡已收到 但是更新状态显示notice was returned

今天去egov上查，发现状态两天前(4/17)变成了
Notice Was Returned To USCIS Because The Post Office Could Not Deliver It

LZ已经在4/1收到了EAD卡，后来搬家顺便把case的地址改了，不知道这个notice没有寄到会不会影响OPT状态，，毕竟他说This could have a serious effect on your case.

另外，LZ求教一下，本人EAD卡start日期是5/1，也就是现在4月份还没生效，是不是用来记录信息的SEVP注册邮件也是5/1之后才会发？
LZ也在765表里勾了要SSN，移民局是不是也要拖到5/1之后才会帮我申请？

之前拿卡去办SSN，工作人员说我的卡还没生效，移民局系统里还没我的数据，总担心这期间会不会有什么幺蛾子，
翻了很多帖子都是关于EAD卡没收到如何，几乎没有案例关于收到EAD后的事情。请问是不是拿到工卡就安全了吗？

egov全文：
On April 17, 2019, the Post Office returned a notice we sent you for your Form I-765, Application for Employment Authorization, Receipt Number YSC199012**, because they could not deliver it. This could have a serious effect on your case. Please go to www.uscis.gov/e-request to request a copy of the notice immediately. If you move, go to www.uscis.gov/addresschange to give us your new mailing address.

楼主后来怎么样了啊？

请问楼主后来怎么样了？