Paste error log contents into the tags. I can confirm this same behavior in 1.5.6b and EO 4.4.0. I can update shipping and it does stay at the new value. But items with or without attributes cannot have the price updated. Items that are on special have the price reverted to the non-special price once the order is saved after changing the price to something else. PHP 7.1.30. No error logs.
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