Question about Jagdgeschwader claims for July 1941

[oquaig]

Hi Guys,
In reading through the accounts for JG 27, JG 52, JG 53, JG 51 I have found a gap in claims for these Jagdgeschwader for the period July 16 thru 21 July. I am certain they were shooting down Soviet planes during this period but I have not found any reports or scores. Was this a period of bad weather? Another thing I have noticed are how few claims are talked about concerning I-16 and I-153 shot down ...were they just too uninteresting to recall in a narrative? More than half of all VVS fighters available in this sector were these types. Can anyone shed some light on this?

Thanks