Yes not drying immediately, as the phone works, can be an issue as slowly small amounts of water evaporate inside the phone then condense when it gets cooler. If there is any contamination this then settles on the small components and their contacts often causing low value short circuits. You may also have debris in the charging port (USBC) I have a case with a barrier to stop the port collecting debris.
You may want to disassemble the phone to dry the modules well in a cool air flow for as long as you can. If there is any sign of dampness it could take a day or more to evaporate.
There are little white dots on the modules which turn red if they get wet, if that’s the case pay special attention to them.
For disassembly guides see
For water damage guide