If the bath is on the other side of the wall have you checked for leaks there. Leaking shower door/curtain? Under sink drain, shower drain and supply pipes? The wall is just stapled down and water can run under it easily so it may be coming from there instead of the pump or piping under the bed.
Take squares of TP and lay on floor any place you can think of and check frequently to see if they are getting wet to help track it down.
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2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
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