辞职回国后H1B petition在USCIS网站上的状态问题

我是19年抽中H1B，当年10月1号COS生效，USCIS我用receipt number track到的case status一直都是“case was approved”
后来赶上了疫情一直到21年6月辞职回国，最近有重拾H1B归海的想法所以又去USCIS看了一眼我的H1B状态，没想变成了一个notice没寄成功


Notice Was Returned To USCIS Because The Post Office Could Not Deliver It
On December 10, 2021, the Post Office returned a notice we sent you for your Form I-129, Petition for a Nonimmigrant Worker, Receipt Number xxxxxx, 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.

想问一下这个notice可能会是什么呀？是我的h1b状态暂停了所以要发个notice说一下？那个地址我已经退租不住了，我接下来应该怎么回应呀？我试了那个erequest链接里面让填notice是什么，问题是我不确定这个notice是什么呀。。。addresschange的话我现在人都已经在中国了。。