Canon HJ21 And HJ40 - strange problems

Sometimes the canon hj21/hj40 iris control does not work on the lenses. On the display on the camera - there is no iris value (empty).
If i set the iris in manual control, reboot camera. The iris value is shown, and i set iris to auto, all work from atem camera control.
On fujinon lens, both on the HD series (HA) and on the 4K series (UA) - such problems do not arise.

Maybe I need to make any additional settings for the iris to work right away?

My cameras are experiencing the same.
Newest firmware with HJ22 IASE, HJ40 IASD, J16 IAS (I haven't tried any other lenses)
The only solution I have found is to restart the camera, sometimes multiple times.
The HJ40 is especially hard to fix, because sometimes you won't have iris control even though it is displayed on the monitor.