TIRWIN: WELCOME TO iRV2.COM
We are glad you joined and posted! I've linked your post to the WORKHORSE forum down below in the Owner's Corner. I'm sure you will get lots of good advice and hopefully an answer.
Here is mine: Look carefully at the filter box and the intake tubing to see if any openings have appeared which may allow water spray to get sucked in. Good luck, and again WELCOME! ED