I would sooner think that the rear stabilizers were "talking" to you due to the excessive strain that you were applying to them by raising your front landing gear while the rears were extended down. Check to see if the rears extend and retract without binding and or making any kind of weird noises.
This is the first lesson of many you will have as an RVer. No problem, we have all had many types of booboo experiences and there will be others to come. Learn by your mistakes and be sure to ask and tell of your experiences on this RV.net forum.
Probably in the future it would be just as easy for you to retract your slides normally and let the slide seals sweep any excess water off. That is what they are designed for. In case of “solid’ debris, pine needles, branches, leaves, or pine cones, it would be best to manually sweep these off with a broom before retracting your slides. Happy camping to you.
Lakeside