Going by the information from kanji.jitenon, I have a question regarding the radicals 飠 and 𩙿. I've noticed that some Kanji seem to be used with either of these while others are displayed exclusively with the latter of the two.
Let's take for example 飴. In digital texts 飴 seems to default to the radical 𩙿, but if you check out the Kanji written in 教科書体 on the website (on the left hand side below the Kanji displayed in big, you can switch the font with the buttons), 飠 is used. The same goes for 蝕 and 餡. On the other hand, there are Kanji that seem to be written only with 𩙿, e.g. in 餌 or 饗 (in both 明朝体 and 教科書体).
I'm not sure what the system here is. Are all instances of 𩙿 interchangeable with 飠 or are there certain Kanji that use exclusively the former? What is the history behind these two?