Hi all,
we have this issue in our environment - even thought we give 365 days validity for Databricks PATS generation, the PATs expire every now and then. Is there any problem with the command we use : 
curl --location --request POST 'https://<<HOST_NAME>>/api/2.0/token/create' \--header 'Authorization: Bearer <<ACCESS_TOKEN_VALUE>> \
 --header 'Content-Type: application/json' \
 --data-raw '{
 "comment": "This is an example token",
 "lifetime_seconds": 31536000
 }'