Flashing Display @ Night while on Wireless Charger (opens in new tab)

I put my S26U on the wireless vertical desk charger on my nightstand for first time last night but woke up to weird flashing lights coming from display. Phone was on proper position for charging and have exact same case (except for MagSafe feature) that was on my S23U. Is the magnetic feature causing this or is there someway to stop this in the phone settings? I like the vertical charger because it doesn't take up space on the nightstand but it is a few years old.