Unless 3.3V is connected ONLY to those resistors, then everything that is powered by 3.3 V is in parallel with the resistors.

If you wait long enough, the reading will likely stabilize, but it could take minutes as capacitors throughout the circuit dis/charge to stable voltage. If there are large capacitors, it could take tens of minutes.

[EDIT] even after stabilizing, the readings won't be correct

 

Ok. I got the idea.

Now going back to actual purpose of these two resistors, they serve as Voltage divider and Vsense is used to read the battery voltage.

Would it allow me to read correct battery voltage on a MCU pin ?

 

Other way around with modern meters. Resistance is measured by applying a current and measuring the voltage.

errr yeah, either way .. is why I continued with ... "There are other methods .." .. both are related. I was explaining WHY this happens ie an
education attempt, as the OP doesn't seem clear as to WHAT is happening. IMO, this is safer than asking him to pull stuff out willy nilly, as we
have little idea of capabilities. ymmv