It is happening to us all.
It is a lot easier on the nerves to not watch/check the updates.
(USPS or Canadian both have the same issues)
Stuff will be MIA for days, weeks then shows as delivered, or resumes course much farther along the path.
All sorts of weird stuff.
Generally best not to look unless a buyer asks then have something done up ahead of time, this is my "form letter" I utilize each time, it has been working well so far:
Hi! Thank you for your note! Your stamps were shipped as advised on Monday March 15th. Unfortunately COVID-19 related delays are affecting a lot of shipments. Some items move at normal speed or even more quickly, some like yours are slowed down significantly. A lot depends on which sorting centers are affected and for how long they are impacted. I am not sure how the postal distribution network is affected in your state/ local area (I am in Canada). 99% of the time parcels just take longer than they should to arrive, especially now. I would really appreciate it if you can wait another couple weeks or so before we decide the package is lost and I refund your money, but I will be ok whenever you decide. If it gets to the point that you think it has been long enough, please just open an item not received case and I will refund your money out of my own funds. Assuming the parcel does arrive after that, let me know and I’ll send another invoice so you can pay again (this is my full time job, small parcels like this are not insured so I am out 100% if they do not arrive). Thank you in advance for your continued patience and have a great day! RICARMIC (Ron)