Receive Disable String feature not work properly with IN-TMM monitoring

Hi everibody,

curl -v http://serverip:80 | grep 503

2. Get server answer

HTTP/1.0 503 Service Unavailable
....

3. Create ltm http Monitor without recv-disable string

create ltm monitor http MON-http send "GET / HTTP/1.0\r\n\r\n" recv "http" recv-disable ""

2. Create Pool

3. Attach Monitor to Pool

4.  Pool status apeared as Avaliability:Available State:Enabled

show ltm monitor http MON-http

5. Add recv-disable string to Monitor

modify ltm monitor http MON-http send "GET / HTTP/1.0\r\n\r\n" recv "http" recv-disable "503"

6. Pool status apeared as Avaliability:Avaliable State:Disabled-by-Parrent

7. Enable in-tmm monitoring feature

modify sys db bigd.tmm value enable

8. Pool status apeared as Avaliability:Offline State:Enabled

9. Change recv-disable string to unmatched from server answer (1234)

modify ltm monitor http MON-http send "GET / HTTP/1.0\r\n\r\n" recv "http" recv-disable "1234"

10. Pool status apeared as Avaliability:Available State:Enabled

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This means that the function Disable String finds the matched pattern in the server response but erroneously changes the Availability instead of the State monitor paramentr. I tried restarting the bigd process, but that didn't help.

Versions where I tried 15.1.8 and 14.1.4.4

Is this a new feature behavior or a bug?