The Tenere never stop giving me headache and problems....

I was pulling in to a hostel backyard yesterday and had to pass over a rather tall thresold. I used the clutch and revved the engine a little, stalled the bike 1 time and the second time I revved the engine and boila I came over the thresold. But after that the clutch didnt work anymore. It seems to work normally - but it doesnt disengage the engine/gearbox. I had the clutch over off together with an experienced mechanic and it looks normal. So I guess that it indicates that it is the gearbox that is the problem? And that means that the engine need to be splitted I suppose...?

Any thoughts and advice appriciated.....

Thanks in advance.

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Suzuki AC 50 -78 owned from 83 to 84
Kawasaki Kh 100 Es 81 owned from 84 to 86
Honda Transalp Xlv 600 -97 owned from 01 to 05
Honda Nx 650 Dominator -98 owned from 07 to 10
Triumph Tiger 955 i -01 owned from 10 to 13
Yamaha XT660Z Tenere ABS -11 owned from 2013 and present bike.
Honda Crf250L -12 my bike in Thailand.