reduced causal adverbial clauses in the second part of a sentence

I should acknowledge that I asked this question in learner's site but I haven't got any helpful response; furthermore, I hold that this is a complex grammatical matter, so that is why I'm repeating this question Can we use a causal adverbial clause in the second part of a sentence? if so, I wonder if I want to use an adverbial clause of causality in the second part of a sentence, should I use a comma before the adverbial clause? For instance, can contract this sentence

Individuals sometimes find themselves drowned in a mountain of tasks since they procrastinate their non-essential yet needed-to-be-done-someday duties to the last minute.

to:

Individuals sometimes find themselves drowned in a mountain of tasks procrastinating their non-essential yet needed-to-be-done-someday duties to the last minute. I would also really appreciate it if you could provide me with some explanation.

Solution 1:

I am sorry that you received no reply from the learners' site. It would have been a lot easier to answer there

Individuals sometimes find themselves drowned in a mountain of tasks since they procrastinate their non-essential yet needed-to-be-done-someday duties to the last minute.

As Edwin Ashworth has pointed out, the transitive use of "procrastinate" sounds very strange to British English ears - I would avoid it, although it may be different in American English.

Your example seems to be unnecessarily wordy. We can simplify it to

we sometimes find ourselves in trouble since we procrastinate our duties to the last minute.

Having done this, we can see that the example is not idiomatic. This then requires correction:

we sometimes find ourselves in trouble because we put off doing things until the last minute.

Now we can use this for the second example:

we sometimes find ourselves in trouble putting off doing things until the last minute.

Now we can see that "putting off doing things until the last minute" is a gerund phrase and (i) cannot modify anything, and (ii) has no clear subject or link to the main clause, which is "we sometimes find ourselves in trouble".

We can correct this by adding "by" to form a gerundive adverbial phrase:

we sometimes find ourselves in trouble {by putting off doing things until the last minute.}