Hi enzor00,
We understand your Apple Watch is disconnecting from your iPhone randomly, and we'd be happy to look closer into this with you.
To get started, when the issue occurs are you seeing a red iPhone icon or red X icon on your watch face as shown in this link here: Check your Apple Watch connection
If so, let's first ensure that your Apple Watch and iPhone are updated to the latest software versions, and test the issue again. If you need help with updating, check out these links below:
Update your iPhone, iPad, or iPod touch
Update your Apple Watch
If the issue persists after updating, have you noticed if the issue occurs in multiple locations? If only occurring in a single location, it's possible that the issue may be due to some wireless interference. Check out this link that can help with that: Resolve Wi-Fi and Bluetooth issues caused by wireless interference
We look forward to hearing back from you.
Take care!