A p/do in a p/catch of another p/do renders implicit exception handling ineffective

[DerGuteMoritz]

Returning a promise constructed with p/do from a p/catch handler of another p/do promise renders the p/catch handler ineffective. Example:

(-> (p/do (throw :boom))
    (p/catch (fn [_] (p/do :ok)))
    (p/handle prn))

;; output:
nil :boom

While returning a resolved promise works fine:

(-> (p/do (throw :boom))
    (p/catch (fn [_] (p/resolved :ok)))
    (p/handle prn))

;; output:
:ok nil

And so does returning a rejected promise from the top-level p/do instead of throwing an exception:

(-> (p/do (p/rejected :boom))
    (p/catch (fn [_] (p/do :ok)))
    (p/handle prn))

;; output:
:ok nil

This relates to version 11.0.678. It still used to work as expected with version 8.0.450 (though I haven't tried any in between versions). Only tested with ClojureScript so far.