3145763 - "Post Billing Document" button can be clicked multiple times and multiple Journal Entries created

In Project Billing (new) scenario, for some invoices, it is possible to click several times the button "Post Billing Document". With each click, a new posting in the G/L was created, but the invoice was still in the status "To-be-posted". 
Canceling the billing document did not create any correction postings. The revenue is posted multiple times.

SAP S/4HANA Cloud 2111

You have maintained a revenue account (to which invoice post) in cost element group YBPS_BILL. It means that the posting is billable.(However, invoice posting is not billable)
It leads to the wrong status of billing document "To be posted". "To be posted" means that the original document is not released to FI yet. With this status, the invoice can be released to FI again and again.

• Do not use accounts of cost element group YBPS_BILL for billing except using On-Account Issued account for on account issued billing

or

• Remove revenue accounts for billing (except On-Account Issued account) from cost element group YBPS_BILL.

Development team will provide fix in the future release to fix this issue permanently.

Invoice, billing, revenue recognition, multiple, several, to-be-posted, status, revenue account, YBPS_BILL , KBA , CO-PC-OBJ-EBR , Event-Based Revenue Recognition , SD-BIL , Billing , PS-BIL , Project Billing , Problem