It seems that phonak has released a new version of the receiver 5.0 but I only see it in European dealers and on ebay that some are offering version 5.0 for sale.
Visually, there are changes because the top where the dome goes is slightly curved.
I heard the news on a German forum where one of the forum members noticed that a new receiver had appeared. He says that the new receiver now also supports the cerustop filter.
The receiver is 3-pin, and supports versions of hearing aids such as Audeo Marvel, Paradise and Lumity
Here are two links to European retailers that sell them
The link says text
This 5.0 speaker is identical to the 4.0 speaker, but you can use a Cerustop filter with it. There were many complaints about Phonak’s Cerushield panel, so they developed the 5.0 speaker.