Hello,
Your post does not say when you logged off nor how much time you were offline, but it sounds to me that you are regenerating stamina just fine if you went from zero to 208. Stamina replenishes at a rate of 1 point per 6 minutes, meaning one hour will give 10 stamina. You also gain 100 stamina at 5am and 1pm. 208 stamina sounds about right for being offline through the night.

Hopefully this helps!

Your original post said 5:21 EST. Was that supposed to be PM, or 17:21 EST? From 9pm to 5am is 8 hours, which is 80 stamina, plus 100 for hitting the 5am mark, means 180, which is a bit less than 208, meaning you probably had some stamina saved up.

If you did indeed mean 9pm one day to 5pm the next, that would be 20 hours, or 200 stamina, plus 100 at 5am and 100 at 1pm, which would have capped you out at 350.

Which time situation is the one you experienced?

Ahhh, I see, ok. Yes that is indeed not working as intended. There are a few ways this can happen. First is if you have a pilot and they're spending the stamina, which is the most common reason for this happening.

If you do not have a pilot that spent your stamina without your knowing, then you will need to put in a CS ticket to get the issue looked at, but you will need screenshots of the before/after for your stamina. You can submit that here:

https://support-center.oasgames.com/