Big-IP Next 20.2.0-2.375.1+0.0.43 iRule count problem

I have very simple iRule to show the problem:

when HTTP_REQUEST {

    set Client_IP [IP::client_addr]

    if { ($Client_IP starts_with "x.x.x.x") && ([HTTP::uri] equals "/seed") } {
        table set -subtable TABLE "key1" "value1" 30
        table set -subtable TABLE "key2" "value2" 15
        table set -subtable TABLE "key3" "value3" 45
        HTTP::respond 200 content "Done"
        TCP::close
        return
	}

    set key_value "key1"
    set key_value2 "key2"
    set key_value3 "key3"

    set count [table keys -subtable TABLE -count]
    

    HTTP::respond 200 content "
    Remaining timeout / defined timeout for ${key_value} => [table lookup -notouch -subtable TABLE ${key_value}] [table timeout -subtable TABLE -remaining ${key_value}]/[table timeout -subtable TABLE ${key_value}]
    Remaining timeout / defined timeout for ${key_value2} => [table lookup -notouch -subtable TABLE ${key_value2}] [table timeout -subtable TABLE -remaining ${key_value2}]/[table timeout -subtable TABLE ${key_value2}]
    Remaining timeout / defined timeout for ${key_value3} => [table lookup -notouch -subtable TABLE ${key_value3}] [table timeout -subtable TABLE -remaining ${key_value3}]/[table timeout -subtable TABLE ${key_value3}]
    Count TABLE ${count}"
}

It looks like table -keys -subtable <tablename> -count don't work properly:

    Remaining timeout / defined timeout for key1 => value1 27/30
    Remaining timeout / defined timeout for key2 => value2 12/15
    Remaining timeout / defined timeout for key3 => value3 42/45
    Count TABLE 0

My expected output would be 3 (as it is not timeouted), not 0.

Can someone check if I am correct? Or tell me how I can count not expired entries in table.