This question isn't very clear - if there is a probate matter I would imagine everything in the deceased estate would be fair game to be reviewed - it depends on what the fight is about.
This is not legal advice nor intended to create an attorney-client relationship. The information provided here is informational in nature only. This attorney may not be licensed in the jurisdiction which you have a question about so the answer could be only general in nature.
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No distributions may be made except with approval of the probate court. Distributions are determined by the will, after all assets are determined and any debts, taxes and other fees paid. If no will, then there is a default distribution to heirs at law. Real property which is left to specific heirs would be distributed to those heirs, subject to the mortgage. That means, the new owners of the home must pay the mortgage or risk losing the home to foreclosure. The heirs do not become personally liable on the loan, however. In many cases, the home is sold by the estate PR and then the net proceeds of sale after the mortgage is paid off are then distributed to the heirs. It all depends on what the will says. If no will, the house will likely be sold.
Why is the PR refusing to distribute? If the estate has been opened, during the end of the probate process (typically 9 months after the estate is opened), the PR is required to distribute the remainder of the estate pursuant to the Will as part of his/her duties. Of course, the PR has to pay off all debts first.