Up until recently, I have been using Betaflight 3.1.0 on my Beecore F3 EVO. A few days ago I decided it was time to upgrade to Betaflight 3.1.6. So I flashed the updated firmware and everything went great. After flashing I made sure that Betaflight had the proper configuration for my Tiny Whoop. I clicked on the Ports tab to find that it now shows:

USB VCP
UART1
UART2
UART3
UART1
UART1

SCREENSHOT BELOW

As for my understanding, F3 boards have 3 UARTS, no more. The strange thing is that my Tiny Whoop still flies perfectly fine. Maybe even a little smoother with BF 3.1.6 compared to the 3.1.0 that I was running. I am assuming that this is not normal? What could make this happen? Is this cause for concern? I will list the configuration/build for my Tiny Whoop below.



My Tiny Whoop -- CUSTOM BUILD
- Inductrix Frame (CLEAR)
- Beecore F3 EVO Flight Controller (FlySky)
----- De-Soldered Motor Connectors
- Racerstar 59,000 RPM 6mm Motors (Color: BLACK)
- Crazepony VM275T v1.1 AIO Micro FPV Camera
- Crazepony Micro AIO FPV Camera Mount/Canopy (Color: CLEAR)
- CUSTOM: 5.8G Whip Antenna
----- DETAILS: 12.8mm 1/4 Wavelength w/ Linear Polarization
----- Personally Hand BUILT + TUNED this Antenna
- RakonHeli 3K Pure Carbon Fiber Frame Stiffener
- HobbyMate Quad-Blade Props (Color: BLACK)
- GIANT POWER 1S 220mah 50C Lipo Batteries

TOTAL WEIGHT: 20.8 grams (without battery)

Did you do a 'full chip erase' when you flashed the new firmware?

If not, you should re-flash with full chip erase so that the old configuration information is cleared.

Yes, I did a full chip erase and I know everything is wired up properly with good soldering. It still flies fine so I wonder if it is just some kind of bug in Betaflight.

Looking at the Betaflight issues list for 3.1.6, it would seem that this is a known problem for this target. It was fixed in the latest 3.1.7 release of Betaflight. See: https://github.com/betaflight/betaflight/issues/2592