I have Expose Pro but I still get the timelimit message after 1 hour

[iec989]

expose share http://localhost:8000 --subdomain=XXXXX
It runs well, but after 1 hour I get this message:
You have reached the maximum connection length for this server. Please upgrade to Expose Pro for unlimited connection length.

I'm confused, because I'm using Expose pro, that's why I can use a custom subdomain btw. And I have to wait 1 hour to use it again... odd.