I had the same thing @Marv_mart in the old 16, very good advice and especially the good old duck tape come's in handy once again. The panda never leaves my house without a rollI had the small nut that holds the knob to open the sky light above the shower had fallen out and it also blew open when travelling. The drain hole was plugged up so found the nut. Used a spring washer and Duct Tape so now secure.
Don't believe a locking nut or spring washer was ever used so others need to check this as well as it can vibrate loose and fall down the drain hole!
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