[1.1.27] Disabled research not counted as a fulfilled prerequisite when researched

[Villfuk02]

Advanced Electronics 2 has Chemical Science Pack as its only prerequisite, so when I research Chemical Science Pack, AE2 is available for research

Then, when I disable the Chemical Science Pack research, AE2 is no longer available for research, even though CSP is still researched

[Klonan]

Yes, that seems to be the way it is written,
If a technology has a prerequisite, and that prerequisite is disabled, you cannot research it

However that does not make it a bug

[curiosity]

It doesn't make sense though, so there's a possibility of it being a bug.