Lost item while chargin in LV array

I am using CompactSolars-1.11.2-5.0.12.333-universal with IC2 industrialcraft-2-2.7.72-ex111 and forge 1.11.2-forge1.11.2-13.20.0.2315. I left a jetpack in the solar array to charge and left the game. When I loaded it again the jetpack had disappeared. I tried it again with an automatic wrench and it happened again. I believe it is a bug.

Best regards,

Marcos