Comment 1 for bug 1952739

Thank you for the bug report. The limit of 10 is hardcoded in the source code.

https://git.launchpad.net/launchpad/tree/lib/lp/code/model/branchmergeproposal.py#n995

I will talk with the team about whether there is a reason for this limit or whether we could lift it.

At very least there should be a message that the list of commits is limited.