Remaining work lost after change of PM

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We have notices that reestimation of remaining work dissapears when pm
is changed.
Eg. PM A publishes a plan and resource B reestimates remaining work
and enters hours of work per day.
Now PM C opens the project and accepts hours of work but remaining
works is set to what it was the week before.
Has anyone come across that issue???
To us is is a major problem, because we have e Project Ofice through
wich all proejct are published by someone in the office, in most cases
not the same person, who published last week

.