No, if they decide to hang out underground for a while it could be to molt, which they do usually need to do soon after coming home, or it could be to destress. This just means that although they are very glad to be in their new home with the things they need, they also need to be left alone to recover from the physical and ‘emotional’ trauma of being caught and shipped and handled and potentially not gently, being deprived of their needs for hours or days , although perhaps not all at once. The point is, they go through a LOT to make it to us, and they just need some time to relax and recover, and possibly molt too. They can stay under for weeks at a time, and they are nocturnal- I assume you have Purple Pinchers- and so do come out at night more readily, as long as they have the darkened hours.
Please do not dig- if they ARE molting you can stress them to a potentially bad point- and if they’re trying to get all good and happy and healthy for you again, who are we to begrudge them that time, right?
Alright it’s late and I’m rambling a bit, apologies, but I hope that helps. Please visit the HCA care pages on here, they are incredibly informative and cover a huge variety of topics. I’ll try to add a link in a minute, unless someone else beats me to it! Best of luck!

Dave the Wondercrab~Pat~MaggieMoo~Billy~
Pop~Corn~Ten~Sam~Tim~Gene

My PP clan