Sharepoint file not updated

Hello, the file was modified four days ago and the changes are visible on the Sharepoint but not in the Power Query. The report is published to the Service and I refreshed the data manually - the refresh was successfull. What is interesting, the data for two sheets is updated and for two - it isn't. 

There are not many transformations:

let
Source = SharePoint.Files("https://xxx.sharepoint.com/sites/xxx/", [ApiVersion = 15]),
#"Filtered Rows" = Table.SelectRows(Source, each ([Name] = "xxx.xlsx")),
#"xxx xlsx_https://steria sharepoint com/sites/xxx/Shared Documents/Customer team management/xxx/xxx/" = #"Filtered Rows"{[Name="xxx.xlsx",#"Folder Path"="https://xxx.sharepoint.com/sites/xxx/Customer team management/xxx/xxx/"]}[Content],
#"Imported Excel Workbook" = Excel.Workbook(#"xxx xlsx_https://xxx sharepoint com/sites/xxx/Shared Documents/Customer team management/xxx/xxx/"),
IncidentsFacts_Sheet = #"Imported Excel Workbook"{[Item="IncidentsFacts",Kind="Sheet"]}[Data],
#"Promoted Headers" = Table.PromoteHeaders(IncidentsFacts_Sheet, [PromoteAllScalars=true]),
#"Changed Type" = Table.TransformColumnTypes(#"Promoted Headers",{{"Priority", Int64.Type}, {"Start of Month", type date}, {"Value", Int64.Type}})
in
#"Changed Type"

I have marked sensitive data as `xxx`. I don't think transformations are reponsible for last four lines to be missing. In the two problematic sheets last four lines were also missing last month. It is strange because two sheets are ok and two sheets are not and they all have the same structures and the same transformation steps were applied.