I've found that sometimes I've managed to chain liquid bridges etc. but most of the time I can't (I'm not sure how I did). I'm not sure which one is the bug but I'm in favour of allowing chaining for greater flexibility. But a problem presents when you chain in series, I've put an example of that below with a primitive mock up of a potential solution. It was a white input symbol before I editted the screenshot.
Steps to Reproduce
Attempt to directly connect the inputs/outputs of two liquid bridges. I haven't worked out how I've managed to build it occasionally.
This issue has not been confirmed by a developer yet.