shell - BASH - After 'wait', why does 'jobs -p' sometimes show 'Done' for a background process? -

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the short version: bash script has function.

this function launches several instances (a maximum of 10) of function in background (with &).

i keep count of how many still active jobs -p | wc -w in loop. when i'm done loop, break.

i use wait ensure processes terminate before continuing.

however, when check count (with jobs -p) sometimes find this: 

[10]   9311 done                    my_background_function_name $param

how can wait proceed when launched child-processes have terminated , jobs list empty?

why jobs shown "done" , not?

clearly, knowledge of how jobs works deficient. :)

thanks.


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