See the latest beta and let me know if this works better for you.
I will say, in general, that the allfields command does work a bit differently from the use of the individual field variables, more or less by design.
That is, the allfields command uses the same code that is actually used on the Display tab, and so is meant to replicate the whole thing without variation.
On the other hand, when you use the individual fields, the intent is to give you more or less the raw data, assuming that in general you will format the data however you like (without even the assumption that you will be generating HTML).
This assumption becomes problematic, however, when the raw data consists of a potential series of values, and it would clearly be advantageous for each of the values to link separately to different locations.
I believe I’ve made adjustments so that, when you use the variable modifier of o on the backlinks field, or the wikilinks field, you should see the same sort of display you see in the normal display.
I haven’t done anything similar with the tags, partially because there are already a couple of variable modifiers available (g and z) that might suit your needs in this department.
Thanks again for the great bug reporting, and let me know how the beta works for you, when you get a chance!