The Bug

The part of tripwire within the blockspace of a tripwire hook, is rendered solid opaque, in contrast with tripwire blocks which are translucent.

The reasoning for this is likely very much the same as what's behind MC-13187 - neither minecraft:water_cauldron nor minecraft:tripwire_hook are called as blocks which can use translucent rendering like for example minecraft:ice can.

Very closely relates to MC-13187 and somewhat to MC-94331.

How to reproduce

1. Place two tripwire hooks one block apart from each other
2. Place string in between
   notice that there is a transparency transition between the tripwire and tripwire hook blocks