Can confirm this happening. Even delivering experiment via other craft will make it yield 0 data for MPL. Transfering experiment to MPL has nothing to do with it. Seems that any science previously delivered in any way (transmission or recovery) by any craft will make it yield 0 data.
To reproduce, as mentioned, put MPL in some orbit with some command module, make crew report, see that it would yield data. Transfer the report, make another one, see that it now would yield 0 data.