Im facing a problem in the seller section

I tried uploading my product file in seller section.After all the sections such as naming, description & screenshots ,now at validation there is error "invalid lot size for open order",
When i test it on my side for several pairs.timeframes,with different spreads,different broker,and with very big lot size,very low lot size amount,with negative and positive values,there is not such error/bug on my side,i dont know how the system is scanning/testing that this error is occurred,

I tested again with some several values,but i dont see such error,how this error can be happened.

In the code it's checking the "FreeMarginCheck" for lot size before opening any order,but still this error is happened

can anyone help me out with this problem