220 Coastal Tournament (Water In cabin with chop)

[Johng941]

Hello everyone new user long time reader. I'm in need of some assistance before I loose my mind trying to find this issue. Hoping someone can point me in the right direction here.

So I have a 2002 Wellcraft 220 Coastal Tournament edition. My daughter and I went fishing over the weekend, we were sitting about 2 miles offshore in a medium chop. Nothing to crazy at all. Upon heading out cabin was 100% dry no issues at all nor have I had issues like this in the past.
After sitting anchored for approx 4 hours (in chop), as im getting ready to pull up anchor I noticed a fair amount of water on the cabin floor (approx a 1/4in more towards the aft of the cabin floor. While putting our gear away (approx 10 mins later) I go back into the cabin and now the water is completely covering the floor front to back approx 1.5in worth. In fear of a serious issue and fear of the boat sinking. I take off and trim the bow up as high as possible while running the rear bildge pump manually. Doing this all the standing water (visually on floor) left the cabin almost instantly.
I had over a hour ride back to the boat ramp and during this ride we went through multiple slow speed and idle zones. Which none of these lead to more water entering the cabin. Once I arrived at the boat ramp I went through and checked what I could while being on the water and did not see any water accessing the cabin at all. Stayed at the ramp for approx a hour checking things and all seemed fine (no more water). If this helps at all I did have the freshwater tank full but I never leave the pump switch on I turn it on to use and then right back off again. The freshwater tank did still have water in it when I arrived at the boat ramp. Can't say how much but did drain the tank before loading up which seemed like a close to full tank but may have been less then I think (emptied using the transom shower head so hard to judge). I don't not use the toliet on the boat so the holding tank for it is empty. The valve at the transom is set to livewell and not raw water. I got home shop vac the water from carpet, under the table base and anywhere else I could get a visual on. Go back out a few hours later to close up the cabin and saw alittle more water under the table base again. This could be water that was missed and not reachable while cleaning/drying the first round but I did make sure it was empty when running the vac maybe there was some still there that worked its way forward or maybe the freshwater tank was not emptied completely and its the culprit of all of this?

Any advice would be GREATLY appreciated! I'm going to start searching today but hoping someone can give me some pointers one how to test and search for this to save me some time and headaches on this hunt so I can get back on the water asap! Thank you again and sorry for such a long first post. Just wanted to assure all details were given so I could get the best assistance/help with this.

[LMK]

Man I hate the mystery water in the cabin. Were you running the livewell that day?
Plumbing fitting do just freaking break on a boat. I have one right now under the main sink. Just broke. Sounds like you have and are checking all of that.
If it a vacuflush toilete that thing holds some water but not that much.
I have experienced leaks on rub rails and port lights but that doesn't make sense either.
I wonder if you would see any water intrusion after a good wash or just a hose down.
I might put some water in the tank and see if it holds while on the hill.
Sorry really not much help - good luck!!